diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 85c28ef..b073772 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@
 # against bad commits.
 
 name: build
-on: [pull_request, push]
+on: [pull_request, push, workflow_dispatch]
 
 jobs:
   build: