diff --git a/Gemfile b/Gemfile
index 521d91d832..2c75e3240d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem "rdoc"
 gem "rake-compiler", "~> 0.9.4"
 
 gem "nio4r", "~> 2.0"
-gem "rack", "~> 1.6"
+gem "rack", "~> 2.2"
 gem "minitest", "~> 5.11"
 gem "minitest-retry"
 gem "minitest-proveit"