diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index e9acda3ea4..bd01ff5fed 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [2.7, 3.0]
+        ruby: [2.7, 3.0.3]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
@@ -48,7 +48,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [3.0]
+        ruby: [3.0.3]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
@@ -86,7 +86,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [2.7, 3.0]
+        ruby: [2.7, 3.0.3]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby