diff --git a/.github/workflows/build_pdf_book.yml b/.github/workflows/build_pdf_book.yml
index 74833d00..43641804 100644
--- a/.github/workflows/build_pdf_book.yml
+++ b/.github/workflows/build_pdf_book.yml
@@ -2,6 +2,8 @@ name: Build latest version of PDF Book
 
 on:
   workflow_dispatch:
+  repository_dispatch:
+    types: [rebuild-book]
 
 permissions:
   contents: write