diff --git a/throttling/Gemfile b/throttling/Gemfile
index b2b3c5b..796764a 100644
--- a/throttling/Gemfile
+++ b/throttling/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-gem 'sinatra', '~> 2.0'
+gem 'sinatra', '~> 2.2'
 gem 'sinatra-contrib', '~> 2.0'
 gem 'rack-throttle'
 gem 'puma'
diff --git a/throttling/Gemfile.lock b/throttling/Gemfile.lock
index 4a579c6..1cec211 100644
--- a/throttling/Gemfile.lock
+++ b/throttling/Gemfile.lock
@@ -1,33 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.17.2)
     multi_json (1.14.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-throttle (0.7.0)
       bundler (>= 1.0.0)
       rack (>= 1.0.0)
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    sinatra-contrib (2.0.8.1)
-      backports (>= 2.8.2)
+    sinatra-contrib (2.2.3)
       multi_json
-      mustermann (~> 1.0)
-      rack-protection (= 2.0.8.1)
-      sinatra (= 2.0.8.1)
+      mustermann (~> 2.0)
+      rack-protection (= 2.2.3)
+      sinatra (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby
@@ -35,7 +33,7 @@ PLATFORMS
 DEPENDENCIES
   puma
   rack-throttle
-  sinatra (~> 2.0)
+  sinatra (~> 2.2)
   sinatra-contrib (~> 2.0)
 
 BUNDLED WITH