diff --git a/Gemfile b/Gemfile
index 2662d9a..8d1a539 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'sinatra', '2.1.0'
+gem 'sinatra', '2.2.0'
 
 group :development, :test do
   gem 'rack-test', '1.1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index d1e20ec..7aa15d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,15 +4,15 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.3)
-    rack-protection (2.1.0)
+    rack-protection (2.2.0)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    ruby2_keywords (0.0.2)
-    sinatra (2.1.0)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     tilt (2.0.10)
 
@@ -21,7 +21,7 @@ PLATFORMS
 
 DEPENDENCIES
   rack-test (= 1.1.0)
-  sinatra (= 2.1.0)
+  sinatra (= 2.2.0)
 
 BUNDLED WITH
    2.1.4