diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index a81483e07..78b693ed3 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         #os: [ubuntu-latest, macos-11]
-        os: macos-11
+        os: [macos-11]
         python_version: ["cp39-*", "cp310-*", "cp311-*"]
     env:
        CIBW_BUILD_VERBOSITY: 1