diff --git a/.github/workflows/otns.yml b/.github/workflows/otns.yml
index 20dc2d941..2d3795628 100644
--- a/.github/workflows/otns.yml
+++ b/.github/workflows/otns.yml
@@ -41,12 +41,12 @@ env:
 jobs:
 
   cancel-previous-runs:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: rokroskar/workflow-run-cleanup-action@master
       env:
         GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
-      if: "github.ref != 'refs/heads/master'"
+      if: "github.ref != 'refs/heads/main'"
 
   unittests:
     name: Unittests