diff --git a/.github/workflows/install-mdbook/action.yml b/.github/workflows/install-mdbook/action.yml
index 28d92111..80d41098 100644
--- a/.github/workflows/install-mdbook/action.yml
+++ b/.github/workflows/install-mdbook/action.yml
@@ -7,7 +7,7 @@ runs:
   steps:
     # The --locked flag is important for reproducible builds.
     - name: Install mdbook
-      run: cargo install mdbook --locked --version 0.4.28
+      run: cargo install mdbook --locked --version 0.4.35
       shell: bash
 
     - name: Install mdbook-last-changed