diff --git a/Gemfile.lock b/Gemfile.lock
index cd6b82d..966752b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,8 @@ GEM
       mini_portile2 (~> 2.3.0)
     puma (3.11.0)
     rack (2.0.3)
-    rack-cors (1.0.2)
+    rack-cors (1.0.5)
+      rack (>= 1.6.0)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.6)