diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2df559b..dc74a69 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,8 +15,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # We want the oldest possible version of MacOS for backwards comparability
-        os: [ubuntu-latest, macos-10.15, windows-latest]
+        # We want the oldest possible version of MacOS for backwards compatibility 
+        os: [ubuntu-latest, macos-11, windows-latest]
 
     steps:
     - uses: actions/checkout@v1