diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1bf408c..dc4f0c1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,7 +3,7 @@ name: Test
 on: [push, pull_request]
 jobs:
   test:
-    runs-on: macOS-latest
+    runs-on: macos-11.0
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v2