diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 72670a3..f675d2a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,6 +16,7 @@ jobs:
       matrix:
         os:
           - windows-2019
+          - ubuntu-20.04
           - ubuntu-18.04
           - ubuntu-16.04
           - macos-10.15