diff --git a/server/Gemfile.lock b/server/Gemfile.lock
index 32e507a..6d8293f 100644
--- a/server/Gemfile.lock
+++ b/server/Gemfile.lock
@@ -7,24 +7,26 @@ GEM
     eventmachine (1.2.7-x64-mingw32)
     eventmachine (1.2.7-x86-mingw32)
     method_source (0.9.2)
-    mustermann (1.0.3)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     puma (3.12.1)
-    rack (2.0.7)
-    rack-protection (2.0.5)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
-    sinatra (2.0.5)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.9)
+    tilt (2.0.10)
 
 PLATFORMS
   ruby