diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 01395f16c..132e704c6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
           - os: windows-2019
             artifact_name: floss.exe
             asset_name: windows
-          - os: macos-11
+          - os: macos-12
             artifact_name: floss
             asset_name: macos
     # Pin action version by commit hash to maximize trust, ref: https://securitylab.github.com/research/github-actions-building-blocks/
@@ -64,7 +64,7 @@ jobs:
           - os: windows-2022
             artifact_name: floss.exe
             asset_name: windows
-          - os: macos-11
+          - os: macos-12
             artifact_name: floss
             asset_name: macos
     steps:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 91e626199..bbc97ec7c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -38,7 +38,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-11]
+        os: [ubuntu-20.04, windows-2019, macos-12]
         # across all operating systems
         # version numbers are strings, not floats
         python-version: ['3.8', '3.11']