diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 4b1297a..ebb3b3b 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ 'ubuntu-18.04', 'ubuntu-20.04', 'ubuntu-22.04', 'ubuntu-24.04' ]
+        os: [ 'ubuntu-20.04', 'ubuntu-22.04', 'ubuntu-24.04' ]
         go: [ '1.23' ]
     name: Go ${{ matrix.go }} + GDAL on ${{ matrix.os }} test
     steps: