diff --git a/.github/workflows/convert_to_fluidnc.yml b/.github/workflows/convert_to_fluidnc.yml
index 5cbab2aa..6dcd6dd1 100644
--- a/.github/workflows/convert_to_fluidnc.yml
+++ b/.github/workflows/convert_to_fluidnc.yml
@@ -7,7 +7,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2