diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
index 34e48be75..0ee30539f 100644
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@@ -56,7 +56,7 @@ jobs:
       max-parallel: 1
       matrix:
         # 7.17 was intentionally skipped because it was added late and was bug fix only
-        target_branch: [7.13, 7.14, 7.15, 7.16, 8.0]
+        target_branch: [7.13, 7.14, 7.15, 7.16, '8.0']
 
     steps:
       - name: Checkout repo