diff --git a/examples/Gemfile b/examples/Gemfile
index e5f5c56..454fe3b 100644
--- a/examples/Gemfile
+++ b/examples/Gemfile
@@ -7,5 +7,5 @@ gem 'haml', '>= 5.0.0'
 gem 'libv8', '~> 3.16'
 gem 'thin'
 gem 'rest-client', '~> 2.1.0'
-gem 'sinatra', '~> 2.1.0'
+gem 'sinatra', '~> 2.2.0'
 gem 'therubyracer', '~> 0.12', require: 'v8'
diff --git a/examples/Gemfile.lock b/examples/Gemfile.lock
index cdf826c..b76ad3b 100644
--- a/examples/Gemfile.lock
+++ b/examples/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
       ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
     rack (2.2.3)
-    rack-protection (2.1.0)
+    rack-protection (2.2.0)
       rack
     ref (2.0.0)
     rest-client (2.1.0)
@@ -34,11 +34,11 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    ruby2_keywords (0.0.4)
-    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)
     temple (0.8.2)
     therubyracer (0.12.3)
@@ -62,7 +62,7 @@ DEPENDENCIES
   haml (>= 5.0.0)
   libv8 (~> 3.16)
   rest-client (~> 2.1.0)
-  sinatra (~> 2.1.0)
+  sinatra (~> 2.2.0)
   therubyracer (~> 0.12)
   thin