diff --git a/backend/family-function-api/Gemfile.lock b/backend/family-function-api/Gemfile.lock
index 43828a1..71a66f8 100644
--- a/backend/family-function-api/Gemfile.lock
+++ b/backend/family-function-api/Gemfile.lock
@@ -81,7 +81,8 @@ GEM
       method_source (~> 0.9.0)
     puma (3.12.1)
     rack (2.0.7)
-    rack-cors (1.0.3)
+    rack-cors (1.0.5)
+      rack (>= 1.6.0)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)