diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c96db1d..5206c94 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,7 +18,7 @@ jobs:
         os: [ 'ubuntu-latest' ]
         python: [3.7, 3.8, 3.9, '3.10']
         include:
-          - os: 'macos-latest'
+          - os: 'darwin'
             python: '3.8'
             experimental: true
 
@@ -34,7 +34,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y shellcheck graphviz
     - name: Brew Install
-      if: startsWith(matrix.os, 'macos')
+      if: startsWith(matrix.os, 'darwin')
       run: |
         brew update
         brew install graphviz