diff --git a/.github/workflows/test_mdbf.yml b/.github/workflows/test_mdbf.yml
index 7376148..9be2293 100644
--- a/.github/workflows/test_mdbf.yml
+++ b/.github/workflows/test_mdbf.yml
@@ -33,7 +33,6 @@ jobs:
       fail-fast: false
       matrix:
         distro:
-          - ubuntu-18.04
           - ubuntu-20.04
           - ubuntu-22.04
           - ubuntu-23.04