diff --git a/Gemfile b/Gemfile
index cad5308..a40a85d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,6 @@ source 'https://rubygems.org'
 gem 'activesupport', '~> 5.2'
 gem 'rubocop', '~> 1'
 gem 'sass', '~> 3.7'
-gem 'sinatra', '~> 2.1'
-gem 'sinatra-contrib', '~> 2.1'
+gem 'sinatra', '~> 2.2'
+gem 'sinatra-contrib', '~> 2.2'
 gem 'thin', '~> 1.8'
diff --git a/Gemfile.lock b/Gemfile.lock
index 7ef2631..fd3d2c7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,7 +21,7 @@ GEM
     parser (3.0.2.0)
       ast (~> 2.4.1)
     rack (2.2.3)
-    rack-protection (2.1.0)
+    rack-protection (2.2.0)
       rack
     rainbow (3.0.0)
     rb-fsevent (0.11.0)
@@ -47,16 +47,16 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sinatra (2.1.0)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
-    sinatra-contrib (2.1.0)
+    sinatra-contrib (2.2.0)
       multi_json
       mustermann (~> 1.0)
-      rack-protection (= 2.1.0)
-      sinatra (= 2.1.0)
+      rack-protection (= 2.2.0)
+      sinatra (= 2.2.0)
       tilt (~> 2.0)
     thin (1.8.1)
       daemons (~> 1.0, >= 1.0.9)
@@ -75,8 +75,8 @@ DEPENDENCIES
   activesupport (~> 5.2)
   rubocop (~> 1)
   sass (~> 3.7)
-  sinatra (~> 2.1)
-  sinatra-contrib (~> 2.1)
+  sinatra (~> 2.2)
+  sinatra-contrib (~> 2.2)
   thin (~> 1.8)
 
 BUNDLED WITH