diff --git a/Gemfile.lock b/Gemfile.lock
index b88e37664..a6243c6f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,7 @@ GEM
       msgpack (~> 1)
     msgpack (1.5.2)
     multipart-post (2.2.3)
-    mustermann (1.1.1)
+    mustermann (1.1.2)
       ruby2_keywords (~> 0.0.1)
     naught (1.1.0)
     netrc (0.11.0)
@@ -129,7 +129,7 @@ GEM
       rqrcode_core (~> 0.1)
     racc (1.6.0)
     rack (2.2.3.1)
-    rack-protection (2.2.0)
+    rack-protection (2.2.1)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -185,10 +185,10 @@ GEM
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
     simple_oauth (0.3.1)
-    sinatra (2.2.0)
+    sinatra (2.2.1)
       mustermann (~> 1.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.0)
+      rack-protection (= 2.2.1)
       tilt (~> 2.0)
     slack-notifier (2.4.0)
     sqlite3 (1.4.4)