diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 89275d7..7c53c69 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ env:
 
 jobs:
   Linux:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - name: Checkout