diff --git a/ruby-2.2-slim-dev/Gemfile.lock b/ruby-2.2-slim-dev/Gemfile.lock
index c508333..382ce2d 100644
--- a/ruby-2.2-slim-dev/Gemfile.lock
+++ b/ruby-2.2-slim-dev/Gemfile.lock
@@ -472,7 +472,8 @@ GEM
     rack-contrib (1.3.0)
       git-version-bump (~> 0.15)
       rack (~> 1.4)
-    rack-cors (0.4.0)
+    rack-cors (1.0.6)
+      rack (>= 1.6.0)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)