diff --git a/Gemfile.lock b/Gemfile.lock
index bcd0a72..a88bac1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,22 +55,26 @@ GEM
     json (1.6.5)
     json_pure (1.6.5)
     multi_json (1.0.4)
-    rack (1.4.1)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.4)
     rack-flash (0.1.2)
       rack
-    rack-protection (1.2.0)
+    rack-protection (2.2.3)
       rack
-    sinatra (1.3.2)
-      rack (~> 1.3, >= 1.3.6)
-      rack-protection (~> 1.2)
-      tilt (~> 1.3, >= 1.3.3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     sinatra-flash (0.3.0)
       sinatra (>= 1.0.0)
     sinatra-redirect-with-flash (0.1.2)
       rack-flash (>= 0.1.1)
       sinatra (>= 0.9.1)
     stringex (1.3.0)
-    tilt (1.3.3)
+    tilt (2.0.11)
     uuidtools (2.1.2)
 
 PLATFORMS