diff --git a/.github/workflows/source-vendor.yml b/.github/workflows/source-vendor.yml
index ec3491a0dd2..3d56c70394f 100644
--- a/.github/workflows/source-vendor.yml
+++ b/.github/workflows/source-vendor.yml
@@ -1,6 +1,6 @@
 name: Create source archive with vendored dependencies
 
-on: [push, pull_request]
+on: [push, workflow_dispatch]
 
 jobs:
   vendor-sources: