diff --git a/Gemfile b/Gemfile
index 10b30b0..762aac6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'sinatra', '~> 2.0'
+gem 'sinatra', '~> 2.2'
 
 group :test do
   gem 'capybara', '~> 2.16'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8d9380b..89c03ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,13 +13,13 @@ GEM
     diff-lcs (1.4.4)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.6)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -36,13 +36,13 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
     rspec-support (3.9.3)
-    ruby2_keywords (0.0.2)
-    sinatra (2.1.0)
-      mustermann (~> 1.0)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     xpath (3.2.0)
       nokogiri (~> 1.8)
 
@@ -52,7 +52,7 @@ PLATFORMS
 DEPENDENCIES
   capybara (~> 2.16)
   rspec (~> 3.4)
-  sinatra (~> 2.0)
+  sinatra (~> 2.2)
 
 BUNDLED WITH
    2.1.4