diff --git a/benchmark/benchmark.py b/benchmark/benchmark.py
index 7f2881c..daf809b 100755
--- a/benchmark/benchmark.py
+++ b/benchmark/benchmark.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 """MIPLearn Benchmark Scripts
diff --git a/miplearn/__init__.py b/miplearn/__init__.py
index 0f76e73..999d3d1 100644
--- a/miplearn/__init__.py
+++ b/miplearn/__init__.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from .benchmark import BenchmarkRunner
diff --git a/miplearn/benchmark.py b/miplearn/benchmark.py
index 20ff04e..c53591e 100644
--- a/miplearn/benchmark.py
+++ b/miplearn/benchmark.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/classifiers/__init__.py b/miplearn/classifiers/__init__.py
index 2fdd117..4cb55a5 100644
--- a/miplearn/classifiers/__init__.py
+++ b/miplearn/classifiers/__init__.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from abc import ABC, abstractmethod
diff --git a/miplearn/classifiers/adaptive.py b/miplearn/classifiers/adaptive.py
index 3b1d5b6..e4914ad 100644
--- a/miplearn/classifiers/adaptive.py
+++ b/miplearn/classifiers/adaptive.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/classifiers/counting.py b/miplearn/classifiers/counting.py
index c793245..75c5875 100644
--- a/miplearn/classifiers/counting.py
+++ b/miplearn/classifiers/counting.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Optional, cast
 
diff --git a/miplearn/classifiers/cv.py b/miplearn/classifiers/cv.py
index aa3cec4..20c19e2 100644
--- a/miplearn/classifiers/cv.py
+++ b/miplearn/classifiers/cv.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/classifiers/sklearn.py b/miplearn/classifiers/sklearn.py
index 4e25d1d..2ab93e9 100644
--- a/miplearn/classifiers/sklearn.py
+++ b/miplearn/classifiers/sklearn.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from typing import Optional, Any, cast
diff --git a/miplearn/classifiers/threshold.py b/miplearn/classifiers/threshold.py
index 9df6a4d..2abae59 100644
--- a/miplearn/classifiers/threshold.py
+++ b/miplearn/classifiers/threshold.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from abc import abstractmethod, ABC
diff --git a/miplearn/components/__init__.py b/miplearn/components/__init__.py
index 14460c8..2ebe21e 100644
--- a/miplearn/components/__init__.py
+++ b/miplearn/components/__init__.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Dict
 
diff --git a/miplearn/components/component.py b/miplearn/components/component.py
index 7542fe0..1f8f917 100644
--- a/miplearn/components/component.py
+++ b/miplearn/components/component.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from typing import Any, List, TYPE_CHECKING, Tuple, Dict, Hashable
diff --git a/miplearn/components/dynamic_common.py b/miplearn/components/dynamic_common.py
index 4d5f1e0..0b2a7c3 100644
--- a/miplearn/components/dynamic_common.py
+++ b/miplearn/components/dynamic_common.py
@@ -1,3 +1,7 @@
+#  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
+#  Released under the modified BSD license. See COPYING.md for more details.
+
 from typing import Dict, Hashable, List, Tuple, TYPE_CHECKING
 
 import numpy as np
diff --git a/miplearn/components/dynamic_lazy.py b/miplearn/components/dynamic_lazy.py
index 2a5d6f9..24b60de 100644
--- a/miplearn/components/dynamic_lazy.py
+++ b/miplearn/components/dynamic_lazy.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/dynamic_user_cuts.py b/miplearn/components/dynamic_user_cuts.py
index c792a01..18b113b 100644
--- a/miplearn/components/dynamic_user_cuts.py
+++ b/miplearn/components/dynamic_user_cuts.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/objective.py b/miplearn/components/objective.py
index b54cde6..52d4254 100644
--- a/miplearn/components/objective.py
+++ b/miplearn/components/objective.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/primal.py b/miplearn/components/primal.py
index 6ab2c7f..1388527 100644
--- a/miplearn/components/primal.py
+++ b/miplearn/components/primal.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/static_lazy.py b/miplearn/components/static_lazy.py
index 3d688a2..00694d1 100644
--- a/miplearn/components/static_lazy.py
+++ b/miplearn/components/static_lazy.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/steps/__init__.py b/miplearn/components/steps/__init__.py
index e69de29..5fbccb1 100644
--- a/miplearn/components/steps/__init__.py
+++ b/miplearn/components/steps/__init__.py
@@ -0,0 +1,3 @@
+#  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
+#  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/miplearn/components/steps/convert_tight.py b/miplearn/components/steps/convert_tight.py
index 27ad8a3..11e186f 100644
--- a/miplearn/components/steps/convert_tight.py
+++ b/miplearn/components/steps/convert_tight.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/steps/drop_redundant.py b/miplearn/components/steps/drop_redundant.py
index e67e17c..7c1aabe 100644
--- a/miplearn/components/steps/drop_redundant.py
+++ b/miplearn/components/steps/drop_redundant.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/components/steps/relax_integrality.py b/miplearn/components/steps/relax_integrality.py
index 75e4950..22bc104 100644
--- a/miplearn/components/steps/relax_integrality.py
+++ b/miplearn/components/steps/relax_integrality.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/features.py b/miplearn/features.py
index 274b47e..52f2fb7 100644
--- a/miplearn/features.py
+++ b/miplearn/features.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import collections
diff --git a/miplearn/instance.py b/miplearn/instance.py
index 17d3c79..99792a9 100644
--- a/miplearn/instance.py
+++ b/miplearn/instance.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import gzip
diff --git a/miplearn/log.py b/miplearn/log.py
index 1fe9a94..a590b97 100644
--- a/miplearn/log.py
+++ b/miplearn/log.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/problems/__init__.py b/miplearn/problems/__init__.py
index 13c148b..5fbccb1 100644
--- a/miplearn/problems/__init__.py
+++ b/miplearn/problems/__init__.py
@@ -1,3 +1,3 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/miplearn/problems/knapsack.py b/miplearn/problems/knapsack.py
index e64265c..ba5bc3e 100644
--- a/miplearn/problems/knapsack.py
+++ b/miplearn/problems/knapsack.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import List
 
diff --git a/miplearn/problems/stab.py b/miplearn/problems/stab.py
index 50b14a4..9971a91 100644
--- a/miplearn/problems/stab.py
+++ b/miplearn/problems/stab.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import networkx as nx
diff --git a/miplearn/problems/tsp.py b/miplearn/problems/tsp.py
index 23da230..e5b4ef4 100644
--- a/miplearn/problems/tsp.py
+++ b/miplearn/problems/tsp.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import networkx as nx
diff --git a/miplearn/solvers/__init__.py b/miplearn/solvers/__init__.py
index 1eebed8..e112062 100644
--- a/miplearn/solvers/__init__.py
+++ b/miplearn/solvers/__init__.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/solvers/gurobi.py b/miplearn/solvers/gurobi.py
index de0bca5..2f4b632 100644
--- a/miplearn/solvers/gurobi.py
+++ b/miplearn/solvers/gurobi.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 import logging
 import re
diff --git a/miplearn/solvers/internal.py b/miplearn/solvers/internal.py
index 620e62d..7a471a2 100644
--- a/miplearn/solvers/internal.py
+++ b/miplearn/solvers/internal.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/solvers/learning.py b/miplearn/solvers/learning.py
index 80b8f7f..5d8431a 100644
--- a/miplearn/solvers/learning.py
+++ b/miplearn/solvers/learning.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/solvers/pyomo/__init__.py b/miplearn/solvers/pyomo/__init__.py
index 13c148b..5fbccb1 100644
--- a/miplearn/solvers/pyomo/__init__.py
+++ b/miplearn/solvers/pyomo/__init__.py
@@ -1,3 +1,3 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/miplearn/solvers/pyomo/base.py b/miplearn/solvers/pyomo/base.py
index 9d04e30..eba8a14 100644
--- a/miplearn/solvers/pyomo/base.py
+++ b/miplearn/solvers/pyomo/base.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/solvers/pyomo/cplex.py b/miplearn/solvers/pyomo/cplex.py
index dc7d15d..9f9b783 100644
--- a/miplearn/solvers/pyomo/cplex.py
+++ b/miplearn/solvers/pyomo/cplex.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Optional
 
diff --git a/miplearn/solvers/pyomo/gurobi.py b/miplearn/solvers/pyomo/gurobi.py
index 4daa74e..4752158 100644
--- a/miplearn/solvers/pyomo/gurobi.py
+++ b/miplearn/solvers/pyomo/gurobi.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/solvers/pyomo/xpress.py b/miplearn/solvers/pyomo/xpress.py
index 3d76bb5..c073df6 100644
--- a/miplearn/solvers/pyomo/xpress.py
+++ b/miplearn/solvers/pyomo/xpress.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/miplearn/types.py b/miplearn/types.py
index 6bbb789..d6ea1f2 100644
--- a/miplearn/types.py
+++ b/miplearn/types.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from typing import Optional, Dict, Callable, Any, Union, Tuple, TYPE_CHECKING
diff --git a/setup.py b/setup.py
index bdc1594..8a5f1f2 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,7 @@
+#  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
+#  Released under the modified BSD license. See COPYING.md for more details.
+
 from setuptools import setup, find_namespace_packages
 
 with open("README.md", "r") as fh:
diff --git a/tests/__init__.py b/tests/__init__.py
index 13c148b..5fbccb1 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,3 +1,3 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/tests/classifiers/__init__.py b/tests/classifiers/__init__.py
index b602796..50d8248 100644
--- a/tests/classifiers/__init__.py
+++ b/tests/classifiers/__init__.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from typing import Tuple
diff --git a/tests/classifiers/test_adaptive.py b/tests/classifiers/test_adaptive.py
index 1074ba7..3c3c8b9 100644
--- a/tests/classifiers/test_adaptive.py
+++ b/tests/classifiers/test_adaptive.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from numpy.linalg import norm
diff --git a/tests/classifiers/test_counting.py b/tests/classifiers/test_counting.py
index 9082754..160a0d5 100644
--- a/tests/classifiers/test_counting.py
+++ b/tests/classifiers/test_counting.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import numpy as np
diff --git a/tests/classifiers/test_cv.py b/tests/classifiers/test_cv.py
index 5a41d9c..423e5d9 100644
--- a/tests/classifiers/test_cv.py
+++ b/tests/classifiers/test_cv.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import numpy as np
diff --git a/tests/classifiers/test_sklearn.py b/tests/classifiers/test_sklearn.py
index f99b657..0c0d429 100644
--- a/tests/classifiers/test_sklearn.py
+++ b/tests/classifiers/test_sklearn.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import numpy as np
diff --git a/tests/classifiers/test_threshold.py b/tests/classifiers/test_threshold.py
index 9f39cb4..e88209c 100644
--- a/tests/classifiers/test_threshold.py
+++ b/tests/classifiers/test_threshold.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from unittest.mock import Mock
diff --git a/tests/components/__init__.py b/tests/components/__init__.py
index 13c148b..5fbccb1 100644
--- a/tests/components/__init__.py
+++ b/tests/components/__init__.py
@@ -1,3 +1,3 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/tests/components/steps/__init__.py b/tests/components/steps/__init__.py
index e69de29..5fbccb1 100644
--- a/tests/components/steps/__init__.py
+++ b/tests/components/steps/__init__.py
@@ -0,0 +1,3 @@
+#  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
+#  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/tests/components/steps/test_convert_tight.py b/tests/components/steps/test_convert_tight.py
index 436f908..48134ab 100644
--- a/tests/components/steps/test_convert_tight.py
+++ b/tests/components/steps/test_convert_tight.py
@@ -1,3 +1,7 @@
+#  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
+#  Released under the modified BSD license. See COPYING.md for more details.
+
 from unittest.mock import Mock
 
 from miplearn.classifiers import Classifier
diff --git a/tests/components/steps/test_drop_redundant.py b/tests/components/steps/test_drop_redundant.py
index aaec305..3273790 100644
--- a/tests/components/steps/test_drop_redundant.py
+++ b/tests/components/steps/test_drop_redundant.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from unittest.mock import Mock, call
diff --git a/tests/components/test_component.py b/tests/components/test_component.py
index 01eb931..aeb8ad8 100644
--- a/tests/components/test_component.py
+++ b/tests/components/test_component.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from unittest.mock import Mock
 
diff --git a/tests/components/test_dynamic_lazy.py b/tests/components/test_dynamic_lazy.py
index 7144a5f..ac0eafd 100644
--- a/tests/components/test_dynamic_lazy.py
+++ b/tests/components/test_dynamic_lazy.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import List, cast
 from unittest.mock import Mock
diff --git a/tests/components/test_dynamic_user_cuts.py b/tests/components/test_dynamic_user_cuts.py
index 0f26cc9..1fa5da0 100644
--- a/tests/components/test_dynamic_user_cuts.py
+++ b/tests/components/test_dynamic_user_cuts.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/tests/components/test_objective.py b/tests/components/test_objective.py
index e3dbcd3..1700017 100644
--- a/tests/components/test_objective.py
+++ b/tests/components/test_objective.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Hashable, Dict
 from unittest.mock import Mock
diff --git a/tests/components/test_primal.py b/tests/components/test_primal.py
index 7ab4766..b7a07bf 100644
--- a/tests/components/test_primal.py
+++ b/tests/components/test_primal.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Dict
 from unittest.mock import Mock
diff --git a/tests/components/test_static_lazy.py b/tests/components/test_static_lazy.py
index bf1f442..f9f19d9 100644
--- a/tests/components/test_static_lazy.py
+++ b/tests/components/test_static_lazy.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Dict, cast, Hashable
 from unittest.mock import Mock, call
diff --git a/tests/fixtures/__init__.py b/tests/fixtures/__init__.py
index 13c148b..5fbccb1 100644
--- a/tests/fixtures/__init__.py
+++ b/tests/fixtures/__init__.py
@@ -1,3 +1,3 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/tests/fixtures/infeasible.py b/tests/fixtures/infeasible.py
index 29a9684..65dac00 100644
--- a/tests/fixtures/infeasible.py
+++ b/tests/fixtures/infeasible.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from typing import Any
diff --git a/tests/fixtures/knapsack.py b/tests/fixtures/knapsack.py
index 8d649ff..8e55af9 100644
--- a/tests/fixtures/knapsack.py
+++ b/tests/fixtures/knapsack.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from miplearn.instance import Instance
 from miplearn.problems.knapsack import KnapsackInstance, GurobiKnapsackInstance
diff --git a/tests/fixtures/redundant.py b/tests/fixtures/redundant.py
index 3dd5107..e714cb5 100644
--- a/tests/fixtures/redundant.py
+++ b/tests/fixtures/redundant.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 from typing import Any
 
diff --git a/tests/problems/__init__.py b/tests/problems/__init__.py
index 13c148b..5fbccb1 100644
--- a/tests/problems/__init__.py
+++ b/tests/problems/__init__.py
@@ -1,3 +1,3 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
diff --git a/tests/problems/test_knapsack.py b/tests/problems/test_knapsack.py
index 553f895..64d76a1 100644
--- a/tests/problems/test_knapsack.py
+++ b/tests/problems/test_knapsack.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import numpy as np
diff --git a/tests/problems/test_stab.py b/tests/problems/test_stab.py
index f0e03e4..cea4810 100644
--- a/tests/problems/test_stab.py
+++ b/tests/problems/test_stab.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import networkx as nx
diff --git a/tests/problems/test_tsp.py b/tests/problems/test_tsp.py
index 88bed41..7567c18 100644
--- a/tests/problems/test_tsp.py
+++ b/tests/problems/test_tsp.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import numpy as np
diff --git a/tests/solvers/__init__.py b/tests/solvers/__init__.py
index 0b02fe4..d1f2377 100644
--- a/tests/solvers/__init__.py
+++ b/tests/solvers/__init__.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from inspect import isclass
diff --git a/tests/solvers/test_internal_solver.py b/tests/solvers/test_internal_solver.py
index 9229441..c43fc4b 100644
--- a/tests/solvers/test_internal_solver.py
+++ b/tests/solvers/test_internal_solver.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/tests/solvers/test_lazy_cb.py b/tests/solvers/test_lazy_cb.py
index a62c872..be088a7 100644
--- a/tests/solvers/test_lazy_cb.py
+++ b/tests/solvers/test_lazy_cb.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/tests/solvers/test_learning_solver.py b/tests/solvers/test_learning_solver.py
index fdb8d0d..9a4e669 100644
--- a/tests/solvers/test_learning_solver.py
+++ b/tests/solvers/test_learning_solver.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import logging
diff --git a/tests/test_benchmark.py b/tests/test_benchmark.py
index b33d695..a09b897 100644
--- a/tests/test_benchmark.py
+++ b/tests/test_benchmark.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 import os.path
diff --git a/tests/test_features.py b/tests/test_features.py
index 43dbae6..d0f12ea 100644
--- a/tests/test_features.py
+++ b/tests/test_features.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
 from miplearn.features import (
diff --git a/tests/test_instance.py b/tests/test_instance.py
index c76b0ad..2713f7b 100644
--- a/tests/test_instance.py
+++ b/tests/test_instance.py
@@ -1,5 +1,5 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
-#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Copyright (C) 2020-2021, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 import tempfile