diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index b14b1f6..4635a44 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -22,14 +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 eca2871..5629aca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to GCPy will be documented in this file.
 
 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
+
 ## [1.5.0] - 2024-05-29
 ### Added
 - Script `gcpy/benchmark/modules/benchmark_utils.py`, with common benchmark utility functions