diff --git a/Gemfile.lock b/Gemfile.lock
index fd1b938..a236451 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,7 +69,8 @@ GEM
     pg (0.21.0)
     puma (3.9.1)
     rack (2.0.3)
-    rack-cors (0.4.1)
+    rack-cors (1.0.5)
+      rack (>= 1.6.0)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.2)