diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b294eaf4..23820335 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: true
       matrix:
         include:
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             # use old linux so that the shared library versioning is more portable
             artifact_name: capa
             asset_name: linux