diff --git a/.gitea/workflows/UndeployPR.yaml b/.gitea/workflows/UndeployPR.yaml
index 583d66d..fb12f4e 100644
--- a/.gitea/workflows/UndeployPR.yaml
+++ b/.gitea/workflows/UndeployPR.yaml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   Deploy PR:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4