diff --git a/book.toml b/book.toml
index 680cc40cb..d63fec020 100644
--- a/book.toml
+++ b/book.toml
@@ -13,7 +13,7 @@ build-dir = "target/book"
 
 [output.html]
 # The URL visitors will be directed to when they try to edit a page
-edit-url-template = "https://github.com/matrix-org/synapse/edit/main/{path}"
+edit-url-template = "https://github.com/matrix-org/matrix-authentication-service/edit/main/{path}"
 
 # The source code URL of the repository
 git-repository-url = "https://github.com/matrix-org/matrix-authentication-service"