diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ab26079..3c9d841 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         target: [linux, windows, macos]