diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index c5b8f3e..4635a44 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -22,7 +22,7 @@ jobs:
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         stale-issue-label: 'stale'
-        exempt-issue-labels: ['category: Discussion','category: Feature Request','deferred','help needed: Open Research Problem','help needed: Request Input from Community','never stale','TODO: Documentation']
+        exempt-issue-labels: 'category: Discussion,category: Feature Request,deferred,help needed: Open Research Problem,help needed: Request Input from Community,never stale,TODO: Documentation'
         days-before-issue-stale: 30
         days-before-issue-close: 7
         stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. If there are no updates within 7 days it will be closed. You can add the "never stale" tag to prevent the issue from closing this issue.'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07725d7..5575ae0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ This file documents all notable changes to the GEOS-Chem Classic wrapper reposit
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased] - TBD
+### Fixed
+- Fixed formatting error in `.github/workflows/stale.yml` that caused the Mark Stale Issues action not to run
+
 ## [14.4.3] - 2024-08-13
 ### Changed
 - Updated GEOS-Chem (science codebase) to 14.4.3