diff --git a/Gemfile.lock b/Gemfile.lock
index e14341d..b3914bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,8 +27,10 @@ GEM
       mongo_ext (>= 0.18.2)
       rack (>= 1.0.1)
     multi_json (1.7.2)
-    rack (1.5.2)
-    rack-protection (1.5.0)
+    mustermann (1.1.2)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.4)
+    rack-protection (2.2.0)
       rack
     rake (10.0.4)
     rspec (2.13.0)
@@ -39,15 +41,17 @@ GEM
     rspec-expectations (2.13.0)
       diff-lcs (>= 1.1.3, < 2.0)
     rspec-mocks (2.13.1)
+    ruby2_keywords (0.0.5)
     simplecov (0.7.1)
       multi_json (~> 1.0)
       simplecov-html (~> 0.7.1)
     simplecov-html (0.7.1)
-    sinatra (1.4.2)
-      rack (~> 1.5, >= 1.5.2)
-      rack-protection (~> 1.4)
-      tilt (~> 1.3, >= 1.3.4)
-    tilt (1.3.7)
+    sinatra (2.2.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
+      tilt (~> 2.0)
+    tilt (2.0.11)
     will_paginate (3.0.4)
 
 PLATFORMS