diff --git a/api-server/Gemfile.lock b/api-server/Gemfile.lock
index 01358084..689f08b1 100644
--- a/api-server/Gemfile.lock
+++ b/api-server/Gemfile.lock
@@ -171,7 +171,8 @@ GEM
     public_suffix (3.1.0)
     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)