diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1902e42..92933a4 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,12 +1,12 @@
 name: build & release
 on:
   release:
-    types: [published]
+    types: [published, workflow_dispatch]
 
 jobs:
     build-n-publish:
         name: Build and publish to PyPI
-        runs-on: ubuntu-18.04
+        runs-on: ubuntu-latest
         steps:
             - name: Checkout branch
               uses: actions/checkout@v2