diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 73ca898d..54e6d7e0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [3.2, 3.1, 3.0, 2.7, 2.6, 2.5, 2.4, 2.3, 2.2, 2.1]
+        ruby-version: [3.2, 3.1, 3.0, 2.7, 2.6, 2.5, 2.4, 2.3]
         bundle-tzinfo: [true, false]
     env:
       BUNDLE_TZINFO: "${{ matrix.bundle-tzinfo }}"