diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5097cc..ffd8c1b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# Version 0.4.0 (Sep 18, 2020)
+
+- Generate simplified solution reports (CSV)
+
 # Version 0.3.3 (Aug 13, 2020)
 
 - Add option to write solution to JSON file in RELOG.solve
diff --git a/Makefile b/Makefile
index ea9f1f0..042e921 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,6 @@
 JULIA := julia --color=yes --project=@.
 SRC_FILES := $(wildcard src/*.jl test/*.jl)
-
-VERSION_MAJOR := 0
-VERSION_MINOR := 3
-VERSION_PATCH := 0
-
-VERSION_SHORT := $(VERSION_MAJOR).$(VERSION_MINOR)
+VERSION := 0.4
 
 all: docs test
 
@@ -20,7 +15,7 @@ clean:
 	rm -rf build/*
 
 docs:
-	mkdocs build -d ../docs/$(VERSION_SHORT)/
+	mkdocs build -d ../docs/$(VERSION)/
 
 test: build/test.log
 
diff --git a/Project.toml b/Project.toml
index 3a99e63..5145af5 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "RELOG"
 uuid = "a2afcdf7-cf04-4913-85f9-c0d81ddf2008"
 authors = ["Alinson S Xavier <axavier@anl.gov>"]
-version = "0.3.2"
+version = "0.4.0"
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
diff --git a/README.md b/README.md
index 9b3c530..a4b236f 100644
--- a/README.md
+++ b/README.md
@@ -3,14 +3,14 @@ RELOG: Reverse Logistics Optimization
 
 **RELOG** is a supply chain optimization package focusing on reverse logistics and reverse manufacturing. For example, the package can be used to determine where to build recycling plants, what sizes should they have and which customers should be served by which plants. The package supports customized reverse logistics pipelines, with multiple types of plants, multiple types of product and multiple time periods.
 
-<img src="https://anl-ceeesa.github.io/RELOG/0.3/images/ex_transportation.png" width="1000px"/>
+<img src="https://anl-ceeesa.github.io/RELOG/0.4/images/ex_transportation.png" width="1000px"/>
 
 ### Documentation
 
-  * [Usage](https://anl-ceeesa.github.io/RELOG/0.3/usage)
-  * [Input and Output Data Formats](https://anl-ceeesa.github.io/RELOG/0.3/format)
-  * [Simplified Solution Reports](https://anl-ceeesa.github.io/RELOG/0.3/reports.md)
-  * [Optimization Model](https://anl-ceeesa.github.io/RELOG/0.3/model)
+  * [Usage](https://anl-ceeesa.github.io/RELOG/0.4/usage)
+  * [Input and Output Data Formats](https://anl-ceeesa.github.io/RELOG/0.4/format)
+  * [Simplified Solution Reports](https://anl-ceeesa.github.io/RELOG/0.4/reports.md)
+  * [Optimization Model](https://anl-ceeesa.github.io/RELOG/0.4/model)
 
 ### Authors
 
@@ -44,4 +44,4 @@ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSE
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
-```
\ No newline at end of file
+```