diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8bd3cf5..8d78a16 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,6 @@ jobs:
         os: [ ubuntu-latest, windows-latest ]
         rack-version: ['~> 2.0', '~> 3.0']
         ruby:
-          - '2.2'
           - '2.3'
           - '2.4'
           - '2.5'