diff --git a/Gemfile b/Gemfile
index 4094679..8c6ad87 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 
-gem "rack", "~> 2.1"
+gem "rack", "~> 2.2"
 gem "puma", "~> 4.3"
diff --git a/Gemfile.lock b/Gemfile.lock
index c64a214..0c1bd37 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,14 +4,14 @@ GEM
     nio4r (2.5.8)
     puma (4.3.12)
       nio4r (~> 2.0)
-    rack (2.1.4.1)
+    rack (2.2.6.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   puma (~> 4.3)
-  rack (~> 2.1)
+  rack (~> 2.2)
 
 BUNDLED WITH
    1.17.1