diff --git a/.github/workflows/build_wheels.yml b/.github/workflows/build_wheels.yml
index d7549bed..501d936f 100644
--- a/.github/workflows/build_wheels.yml
+++ b/.github/workflows/build_wheels.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest, macos-latest, windows-latest, macos-latest-xlarge]
+        os: [ ubuntu-latest, macos-latest, windows-latest, flyci-macos-14-m2]
 
     steps:
       - uses: awvwgk/setup-fortran@main
diff --git a/camb/cambdll.dll b/camb/cambdll.dll
index d7fbe665..2016ca81 100644
Binary files a/camb/cambdll.dll and b/camb/cambdll.dll differ