diff --git a/Gemfile.lock b/Gemfile.lock
index 4b3a325d98..127434d4a7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -316,7 +316,7 @@ GEM
     multipart-parser (0.1.1)
     multipart-post (2.4.1)
     mustache (1.1.2)
-    mustermann (3.1.0)
+    mustermann (3.1.1)
     mutex_m (0.3.0)
     mysql2 (0.5.7)
       bigdecimal