diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4ed68d77c..10fcfaef3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,7 @@
 name: Build MicroPython
 
 on:
+  workflow_dispatch:
   push:
     branches: '*'
   pull_request: