diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 70eff93f..239d9a95 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-18.04
     strategy:
       matrix:
         python-version: