diff --git a/Gemfile.lock b/Gemfile.lock
index 9301ff1..3dce14c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,8 +2,10 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.2.4)
-    rack (1.5.2)
-    rack-protection (1.5.0)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rack-test (0.6.2)
       rack (>= 1.0)
@@ -15,11 +17,13 @@ GEM
     rspec-expectations (2.14.0)
       diff-lcs (>= 1.1.3, < 2.0)
     rspec-mocks (2.14.1)
-    sinatra (1.4.3)
-      rack (~> 1.4)
-      rack-protection (~> 1.4)
-      tilt (~> 1.3, >= 1.3.4)
-    tilt (1.4.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
+      tilt (~> 2.0)
+    tilt (2.0.10)
 
 PLATFORMS
   ruby