diff --git a/Gemfile.lock b/Gemfile.lock
index 4025316..34d6c7f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -87,7 +87,8 @@ GEM
     powerpack (0.1.1)
     puma (3.8.2)
     rack (2.0.1)
-    rack-cors (0.4.1)
+    rack-cors (1.0.5)
+      rack (>= 1.6.0)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.2)