diff --git a/.github/workflows/mutation-testing-caller.yml b/.github/workflows/mutation-testing-caller.yml
index ad25c9dd..2576f145 100644
--- a/.github/workflows/mutation-testing-caller.yml
+++ b/.github/workflows/mutation-testing-caller.yml
@@ -21,7 +21,7 @@ jobs:
     permissions:
       contents: read
       id-token: write # OIDC workflow-source resolution
-    uses: leynos/shared-actions/.github/workflows/mutation-mutmut.yml@18bed1ca49a6de3d8882bd72635a32ae3f023d57
+    uses: leynos/shared-actions/.github/workflows/mutation-mutmut.yml@4d696e72fff6db49f34302ccf119ba978f1032c9
     with:
       # Mutable Python source lives in workflow_scripts/, not src/.
       paths: "workflow_scripts/"