diff --git a/Gemfile b/Gemfile
index c03ffaf..84d0447 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'http://rubygems.org'
 
-gem 'sinatra', '~> 2.0'
+gem 'sinatra', '~> 2.2'
 gem 'jwt', '~> 2.1'
 gem 'octokit', '~> 4.0'
 gem 'rubocop'
diff --git a/Gemfile.lock b/Gemfile.lock
index 2611e27..0395b2c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,8 @@ GEM
     jaro_winkler (1.5.1)
     jwt (2.1.0)
     multipart-post (2.0.0)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parallel (1.12.1)
@@ -19,8 +20,8 @@ GEM
       ast (~> 2.4.0)
     powerpack (0.1.2)
     public_suffix (3.0.3)
-    rack (2.0.6)
-    rack-protection (2.0.4)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rainbow (3.0.0)
     rubocop (0.60.0)
@@ -32,15 +33,16 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.4.0)
     ruby-progressbar (1.10.0)
+    ruby2_keywords (0.0.5)
     sawyer (0.8.1)
       addressable (>= 2.3.5, < 2.6)
       faraday (~> 0.8, < 1.0)
-    sinatra (2.0.4)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.4)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.8)
+    tilt (2.0.11)
     unicode-display_width (1.4.0)
 
 PLATFORMS
@@ -52,7 +54,7 @@ DEPENDENCIES
   jwt (~> 2.1)
   octokit (~> 4.0)
   rubocop
-  sinatra (~> 2.0)
+  sinatra (~> 2.2)
 
 BUNDLED WITH
    1.17.1