diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f1f2a02..a53db46 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -303,12 +303,12 @@ jobs:
               - libc++-18-dev
               - libc++abi-18-dev
 
-          - toolset: clang
-            cxxstd: "11,14,17,20,2b"
-            os: macos-13
           - toolset: clang
             cxxstd: "11,14,17,20,2b"
             os: macos-14
+          - toolset: clang
+            cxxstd: "11,14,17,20,23"
+            os: macos-15
 
     timeout-minutes: 30
     runs-on: ${{matrix.os}}