diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dbb536f..d7ebc13 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     services:
       redis:
         image: redis