diff --git a/Gemfile.lock b/Gemfile.lock
index a7e02f9..e039941 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,13 +20,16 @@ GEM
     json (1.6.5)
     mime-types (1.17.2)
     multi_json (1.0.4)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     nokogiri (1.5.0)
-    rack (1.4.1)
-    rack-protection (1.2.0)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rack-test (0.6.1)
       rack (>= 1.0)
     rdiscount (1.6.8)
+    ruby2_keywords (0.0.5)
     rubyzip (0.9.6.1)
     selenium-webdriver (2.19.0)
       childprocess (>= 0.2.5)
@@ -35,15 +38,16 @@ GEM
       rubyzip
     shotgun (0.9)
       rack (>= 1.0)
-    sinatra (1.3.2)
-      rack (~> 1.3, >= 1.3.6)
-      rack-protection (~> 1.2)
-      tilt (~> 1.3, >= 1.3.3)
+    sinatra (2.2.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
+      tilt (~> 2.0)
     thin (1.3.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
-    tilt (1.3.3)
+    tilt (2.0.10)
     xpath (0.1.4)
       nokogiri (~> 1.3)
     yard (0.7.5)