diff --git a/graphql/Gemfile.lock b/graphql/Gemfile.lock
index 6a32148..5945bf6 100644
--- a/graphql/Gemfile.lock
+++ b/graphql/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     multi_json (1.15.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-contrib (2.3.0)
       rack (~> 2.0)
     rack-graphiql (0.1.1)