diff --git a/Gemfile.lock b/Gemfile.lock
index 48b8aac..1782a9e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     graphql (1.9.7)
     mustermann (1.0.3)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-contrib (2.1.0)
       rack (~> 2.0)
     rack-graphiql (0.1.1)