diff --git a/unittest/action.yml b/unittest/action.yml
index 8bb86388..43d01547 100644
--- a/unittest/action.yml
+++ b/unittest/action.yml
@@ -56,7 +56,7 @@ runs:
 
     - name: Combine Coverage Reports # This is because one report is produced per project, and we want one result for all of them.
       if: ${{ inputs.test-coverage == 'true' }}
-      uses: danielpalme/ReportGenerator-GitHub-Action@5
+      uses: danielpalme/ReportGenerator-GitHub-Action@5808021ec4deecb0ab3da051d49b4ce65fcc20af
       with:
         reports: '**/*.cobertura.xml' # REQUIRED # The coverage reports that should be parsed (separated by semicolon). Globbing is supported.
         targetdir: '${{ github.workspace }}' # REQUIRED # The directory where the generated report should be saved.