diff --git a/Gemfile.lock b/Gemfile.lock
index f3650b8..af434ba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -225,7 +225,8 @@ GEM
     puma (4.2.1)
       nio4r (~> 2.0)
     rack (1.6.11)
-    rack-cors (1.0.2)
+    rack-cors (1.0.5)
+      rack (>= 1.6.0)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.11.1)