diff --git a/Gemfile.lock b/Gemfile.lock
index 5159682..1a0f144 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     multi_json (1.15.0)
     mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.8.1)
+    rack (2.2.14)
     rack-protection (2.2.3)
       rack
     rack-ssl-enforcer (0.2.9)