diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e3dfa11..ba6662f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         toolchain: [{compiler: gcc, version: 11}]
         include:
           - os: ubuntu-latest