diff --git a/Gemfile b/Gemfile
index 84b2cdf..bda5f7b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -83,7 +83,7 @@ gem 'ffi', '~> 1.9', '>= 1.9.25'
 gem 'loofah', '~> 2.3', '>= 2.3.1'
 gem 'nokogiri', '~> 1.10', '>= 1.10.8'
 gem 'puma', '~> 3.0', '>= 3.12.5'
-gem 'rack', '~> 2.0', '>= 2.1.4'
+gem 'rack', '~> 2.2'
 gem 'rails-html-sanitizer', '~> 1.0', '>= 1.0.4'
 gem 'rest-client', '~> 1.8', '>= 1.8.0'
 gem 'sprockets', '~> 3.7', '>= 3.7.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 87557fe..630c9b2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -163,7 +163,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (4.0.1)
     puma (3.12.6)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.7.2)
@@ -321,7 +321,7 @@ DEPENDENCIES
   phantomjs
   poltergeist
   puma (~> 3.0, >= 3.12.5)
-  rack (~> 2.0, >= 2.1.4)
+  rack (~> 2.2)
   rails (~> 5.0.0, >= 5.0.0.1)
   rails-controller-testing
   rails-html-sanitizer (~> 1.0, >= 1.0.4)