diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 08302fed791..29cfaa4f6d6 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -31,7 +31,7 @@ jobs:
         matrix:
           psql: [11,12,13,14,15]
           postgis: [3]
-          os: [ubuntu-latest, ubuntu-20.04, ubuntu-18.04]
+          os: [ubuntu-latest, ubuntu-20.04]
 
     steps:
       - uses: actions/checkout@v3