diff --git a/Gemfile.lock b/Gemfile.lock
index 6a030be..95cd9e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,6 +30,8 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
     mini_portile2 (2.1.0)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nokogiri (1.7.0.1)
       mini_portile2 (~> 2.1.0)
     org-ruby (0.9.12)
@@ -39,8 +41,8 @@ GEM
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
     public_suffix (2.0.5)
-    rack (1.6.5)
-    rack-protection (1.5.3)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -60,21 +62,23 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
+    ruby2_keywords (0.0.5)
     rubypants (0.6.0)
     simplecov (0.12.0)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
-    sinatra (1.4.7)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     thin (1.7.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.5)
+    tilt (2.0.11)
     twitter-text (1.14.0)
       unf (~> 0.1.0)
     unf (0.1.4)