diff --git a/.github/workflows/post-release.yml b/.github/workflows/post-release.yml
index 1012f4e..309be68 100644
--- a/.github/workflows/post-release.yml
+++ b/.github/workflows/post-release.yml
@@ -62,7 +62,7 @@ jobs:
         build: [linux, macos, win-msvc]
         include:
         - build: linux
-          os: ubuntu-18.04
+          os: ubuntu-20.04
           rust: stable
           target: x86_64-unknown-linux-musl
         - build: macos