diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 01b8f72..ad14fcc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -58,7 +58,7 @@ jobs:
         os:
           - ubuntu-20.04
           - windows-2019
-          - macos-11.0
+          - macos-10.15
         toolchain:
           - stable
           - beta