diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ac8443c..005c0e5 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -76,6 +76,8 @@ jobs:
             artifacts/*
             install.sh
             install.ps1
+          # Pre-release tags (e.g. v1.1.0-alpha.1) publish as pre-releases.
+          prerelease: ${{ contains(github.ref_name, '-alpha') }}
           generate_release_notes: true
 
   image: