diff --git a/.github/workflows/install-mdbook/action.yml b/.github/workflows/install-mdbook/action.yml
index 5da27cf..bca4311 100644
--- a/.github/workflows/install-mdbook/action.yml
+++ b/.github/workflows/install-mdbook/action.yml
@@ -5,16 +5,20 @@ description: Install mdbook with the dependencies we need.
 runs:
   using: composite
   steps:
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        toolchain: stable
     # The --locked flag is important for reproducible builds. It also
     # avoids breakage due to skews between mdbook and mdbook-svgbob.
     - 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-svgbob
-      run: cargo install mdbook-svgbob --locked --version 0.2.1
+      run: cargo install mdbook-svgbob --git https://github.com/boozook/mdbook-svgbob --rev 6f62155
       shell: bash
 
     - name: Install mdbook-i18n-helpers
-      run: cargo install mdbook-i18n-helpers --locked --version 0.1.0
+      run: cargo install mdbook-i18n-helpers --locked --version 0.2.4
       shell: bash
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