diff --git a/.github/workflows/docs-release.yaml b/.github/workflows/docs-release.yaml
index 98508892..e7c95a55 100644
--- a/.github/workflows/docs-release.yaml
+++ b/.github/workflows/docs-release.yaml
@@ -30,7 +30,7 @@ jobs:
           fetch-depth: 0
 
       - name: Build docs
-        uses: docker://ghcr.io/bjw-s/mdbook:0.4.28@sha256:1922be7fe6c517cb15b8bc09107027a7dd819194e7789f3310f184ef4271ff2a
+        uses: docker://ghcr.io/bjw-s/mdbook:0.4.29@sha256:2e33619757eaf2a3deec522f057293cbbda66d55303d0af94970329451543218
         with:
           args: bash -c "cd docs && mdbook build"