diff --git a/playbooks/releasenotes/run.yaml b/playbooks/releasenotes/run.yaml
index f38d86d4..2a4ef0a5 100644
--- a/playbooks/releasenotes/run.yaml
+++ b/playbooks/releasenotes/run.yaml
@@ -127,3 +127,4 @@
           # Revert any changes to the index file.
           git checkout -- ${DIRECTORY}/source/index.rst
         chdir: 'src/{{ zuul.project.canonical_name }}'
+        executable: /bin/bash