diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a2b9cc30d..fed51378c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     if: github.repository == 'rust-lang/rustc-dev-guide'
     runs-on: ubuntu-latest
     env:
-      MDBOOK_VERSION: 0.4.7
+      MDBOOK_VERSION: 0.4.12
       MDBOOK_LINKCHECK_VERSION: 0.7.2
       MDBOOK_TOC_VERSION: 0.6.1
       DEPLOY_DIR: book/html
diff --git a/book.toml b/book.toml
index bad4fe1aa..fb09c804e 100644
--- a/book.toml
+++ b/book.toml
@@ -12,6 +12,7 @@ renderer = ["html"]
 
 [output.html]
 git-repository-url = "https://github.com/rust-lang/rustc-dev-guide"
+edit-url-template = "https://github.com/rust-lang/rustc-dev-guide/tree/master/{path}?mode=edit"
 
 [output.html.fold]
 enable = true