diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 754ae22..90767b0 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        [ubuntu-20.04, macos-13, windows-2022]
+        os: [ubuntu-20.04, macos-13, windows-2022]
 
     steps:
       - uses: actions/checkout@v3