diff --git a/Gemfile b/Gemfile
index 7bd29d5..f32492e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,4 +5,4 @@ gem 'rack-ssl', '~> 1.4'
 gem 'sinatra', '~> 2.0', '>= 2.0.4'
 gem 'json'
 gem 'mongo'
-gem 'rack', '~> 2.1'
+gem 'rack', '~> 2.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 870351e..920e97d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
       bson (>= 4.8.2, < 5.0.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-protection (2.1.0)
       rack
     rack-ssl (1.4.1)
@@ -32,7 +32,7 @@ PLATFORMS
 DEPENDENCIES
   json
   mongo
-  rack (~> 2.1)
+  rack (~> 2.2)
   rack-ssl (~> 1.4)
   sinatra (~> 2.0, >= 2.0.4)
   thin