diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 532e78d..b3787ce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -52,7 +52,7 @@ jobs:
     strategy:
       fail-fast: False
       matrix:
-        os: [ ubuntu-latest, macos-latest, macos-14 ]
+        os: [ ubuntu-latest, macos-latest, macos-13 ]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -90,7 +90,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ windows-latest, ubuntu-latest, macos-latest, macos-14 ]
+        os: [ windows-latest, ubuntu-latest, macos-latest, macos-13 ]
         python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
 
     steps:
diff --git a/extern/nlopt b/extern/nlopt
index 75dd16e..11cff2c 160000
--- a/extern/nlopt
+++ b/extern/nlopt
@@ -1 +1 @@
-Subproject commit 75dd16e147c265a70b14ee5cde6af943b576f726
+Subproject commit 11cff2c773b4b98821915a72179f4667c307ce6d