diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6861c29..8f228cb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ jobs:
   build_unix:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest]
 
     runs-on: ${{ matrix.os }}
     steps: