diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 33210e9..4db6850 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -118,6 +118,9 @@ jobs:
           - toolset: clang
             cxxstd: "03,11,14,17,2a"
             os: macos-11
+          - toolset: clang
+            cxxstd: "03,11,14,17,2a"
+            os: macos-12
 
     runs-on: ${{matrix.os}}
     container: ${{matrix.container}}
@@ -238,6 +241,7 @@ jobs:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
           - os: macos-11
+          - os: macos-12
 
     runs-on: ${{matrix.os}}
 
@@ -284,6 +288,7 @@ jobs:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
           - os: macos-11
+          - os: macos-12
 
     runs-on: ${{matrix.os}}
 
@@ -340,6 +345,7 @@ jobs:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
           - os: macos-11
+          - os: macos-12
 
     runs-on: ${{matrix.os}}