diff --git a/Gemfile.lock b/Gemfile.lock
index 687425c..a671674 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,14 +22,15 @@ GEM
       activemodel (>= 5.1, < 6.0.0)
       mongo (>= 2.5.1, < 3.0.0)
     multi_json (1.13.1)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.4.0)
     puma (4.0.1)
       nio4r (~> 2.0)
-    rack (2.0.7)
+    rack (2.2.4)
     rack-conneg (0.1.6)
       rack (>= 1.0)
-    rack-protection (2.0.5)
+    rack-protection (2.2.3)
       rack
     representable (3.0.4)
       declarative (< 0.1.0)
@@ -37,13 +38,14 @@ GEM
       uber (< 0.2.0)
     roar (1.1.0)
       representable (~> 3.0.0)
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     uber (0.1.0)