diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 446ee334..823fdaab 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,7 +33,6 @@ jobs:
           - {os: ubuntu-22.04, ruby: '3.0', db: mariadb10.6}
           - {os: ubuntu-20.04, ruby: '2.7', db: mariadb10.6}
           - {os: ubuntu-20.04, ruby: '2.7', db: mysql80}
-          - {os: ubuntu-18.04, ruby: '2.7', db: mysql57}
 
           # TODO - Windows CI
           # - {os: windows-2022, ruby: '3.2', db: mysql80}