diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c58a9e5..adde880 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby_version: ["2.2", "2.7"]
+        ruby_version: ["2.4", "2.7"]
         experimental: [false]
         include:
           - ruby_version: "3.0"