diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index ba57228e..f989f57b 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -37,9 +37,14 @@ jobs:
 
       - uses: Swatinem/rust-cache@v1
 
+      - name: Setup mdBook
+        uses: peaceiris/actions-mdbook@v1.1.14
+        with:
+          mdbook-version: '0.4.18'
+
+      # TODO: actions-mdbook does not yet have an option to install mdbook-mermaid https://github.com/peaceiris/actions-mdbook/issues/426
       - name: Install mdbook
         run: |
-          cargo install mdbook
           cargo install mdbook-mermaid
 
       - name: Build Zebra book