diff --git a/.github/workflows/gh-ci.yaml b/.github/workflows/gh-ci.yaml
index bc8c3b33..77fde6f6 100644
--- a/.github/workflows/gh-ci.yaml
+++ b/.github/workflows/gh-ci.yaml
@@ -119,6 +119,10 @@ jobs:
         matrix:
           os: [macOS-latest, ubuntu-latest]
           python-version: ["3.10", "3.11", "3.12"]
+        exclude:
+          # mdtraj currently doesn't support MacOS py3.12
+          - os: "macOS-latest"
+            python-version: "3.12"
 
 
     steps: