diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 791d2102..34d2d5bd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ on:
 jobs:
   build_ubuntu_x11:
     name: Build Ubuntu
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04
 
     steps:
       - uses: actions/checkout@v2