diff --git a/Gemfile b/Gemfile
index 5eba4812..97f31021 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gemspec
 
 gem("minitest", "5.20.0")
 gem("rake-compiler", "1.2.5")
-gem("rake-compiler-dock", "1.3.0")
+gem("rake-compiler-dock", "1.3.1")
 gem("rdoc", "6.5.0")
 gem("psych", "5.1.0")