diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fdaede4..31b0ceb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -106,7 +106,7 @@ jobs:
           files: |
             fbx2gltf-windows.zip
   build-ubuntu:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2