diff --git a/Gemfile.lock b/Gemfile.lock
index 6d1fcc64556..80dc67825c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -659,7 +659,7 @@ GEM
       rack
     gravatar_image_tag (1.2.0)
     hana (1.3.7)
-    hashdiff (1.2.0)
+    hashdiff (1.2.1)
     hashery (2.1.2)
     hashie (5.0.0)
     highline (3.1.2)
@@ -792,7 +792,7 @@ GEM
     minitest (5.25.5)
     msgpack (1.8.0)
     multi_json (1.17.0)
-    mustermann (3.0.3)
+    mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)
     mustermann-grape (1.1.0)
       mustermann (>= 1.0.0)
@@ -1711,7 +1711,7 @@ CHECKSUMS
   gravatar_image_tag (1.2.0) sha256=eb5630fea846b711e713b934a0178fb9785f02f4eb9ced8d6faa4d537c40fdcf
   grids (1.0.0)
   hana (1.3.7) sha256=5425db42d651fea08859811c29d20446f16af196308162894db208cac5ce9b0d
-  hashdiff (1.2.0) sha256=c984f13e115bfc9953332e8e83bd9d769cfde9944e2d54e07eb9df7b76e140b5
+  hashdiff (1.2.1) sha256=9c079dbc513dfc8833ab59c0c2d8f230fa28499cc5efb4b8dd276cf931457cd1
   hashery (2.1.2) sha256=d239cc2310401903f6b79d458c2bbef5bf74c46f3f974ae9c1061fb74a404862
   hashie (5.0.0) sha256=9d6c4e51f2a36d4616cbc8a322d619a162d8f42815a792596039fc95595603da
   highline (3.1.2) sha256=67cbd34d19f6ef11a7ee1d82ffab5d36dfd5b3be861f450fc1716c7125f4bb4a
@@ -1768,7 +1768,7 @@ CHECKSUMS
   minitest (5.25.5) sha256=391b6c6cb43a4802bfb7c93af1ebe2ac66a210293f4a3fb7db36f2fc7dc2c756
   msgpack (1.8.0) sha256=e64ce0212000d016809f5048b48eb3a65ffb169db22238fb4b72472fecb2d732
   multi_json (1.17.0) sha256=76581f6c96aebf2e85f8a8b9854829e0988f335e8671cd1a56a1036eb75e4a1b
-  mustermann (3.0.3) sha256=d1f8e9ba2ddaed47150ddf81f6a7ea046826b64c672fbc92d83bce6b70657e88
+  mustermann (3.0.4) sha256=85fadcb6b3c6493a8b511b42426f904b7f27b282835502233dd154daab13aa22
   mustermann-grape (1.1.0) sha256=8d258a986004c8f01ce4c023c0b037c168a9ed889cf5778068ad54398fa458c5
   my_page (1.0.0)
   net-http (0.6.0) sha256=9621b20c137898af9d890556848c93603716cab516dc2c89b01a38b894e259fb