diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 02794a3aa..c4a9ee60c 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -53,7 +53,7 @@ jobs:
     needs: retag-nightly
     if: github.repository == 'CESNET/UltraGrid' || github.repository == 'MartinPulec/UltraGrid'
     name: run Ubuntu
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-16.04
     env:
       sdk_pass: ${{ secrets.sdk_pass }}