diff --git a/Gemfile.lock b/Gemfile.lock
index e14341d..4e8f2a4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,12 +6,14 @@ GEM
     autotest (4.4.6)
       ZenTest (>= 4.4.1)
     autotest-growl (0.2.16)
+    base64 (0.2.0)
     bson (1.8.5)
     bson_ext (1.8.5)
       bson (~> 1.8.5)
     chronic (0.9.1)
     diff-lcs (1.2.3)
     fattr (2.2.1)
+    logger (1.6.1)
     main (5.2.0)
       arrayfields (>= 4.7.4)
       chronic (>= 0.6.2)
@@ -27,9 +29,15 @@ GEM
       mongo_ext (>= 0.18.2)
       rack (>= 1.0.1)
     multi_json (1.7.2)
-    rack (1.5.2)
-    rack-protection (1.5.0)
-      rack
+    mustermann (3.0.3)
+      ruby2_keywords (~> 0.0.1)
+    rack (3.1.8)
+    rack-protection (4.1.0)
+      base64 (>= 0.1.0)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
     rake (10.0.4)
     rspec (2.13.0)
       rspec-core (~> 2.13.0)
@@ -39,15 +47,19 @@ 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 (4.1.0)
+      logger (>= 1.6.0)
+      mustermann (~> 3.0)
+      rack (>= 3.0.0, < 4)
+      rack-protection (= 4.1.0)
+      rack-session (>= 2.0.0, < 3)
+      tilt (~> 2.0)
+    tilt (2.4.0)
     will_paginate (3.0.4)
 
 PLATFORMS