diff --git a/Project.toml b/Project.toml
index 4365b26..50bf3c1 100644
--- a/Project.toml
+++ b/Project.toml
@@ -33,6 +33,6 @@ JSON = "0.21"
 JSONSchema = "0.2"
 JuMP = "0.21"
 MathOptInterface = "0.9"
-PackageCompiler = "1.2"
+PackageCompiler = "1"
 ProgressBars = "0.6"
-julia = "1.3 - 1.5"
+julia = "1"