diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e6cb351..c961d0d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [1.9.3, '2.0', 2.1, 2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1]
+        ruby: [1.9.3, 2.1, 2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1]
         experimental: [false]
         include:
           - ruby: '2.0'