diff --git a/.github/workflows/actions_test.yml b/.github/workflows/actions_test.yml
index acf1e42..1fdbf33 100644
--- a/.github/workflows/actions_test.yml
+++ b/.github/workflows/actions_test.yml
@@ -5,7 +5,7 @@ on: [push]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     
     steps:
     - uses: actions/checkout@v1