diff --git a/.github/workflows/docs-release.yaml b/.github/workflows/docs-release.yaml
index 60861eb3..66136e62 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:0.4.27@sha256:4dfb6b8b2b39ac84ed1d33b481ea147db6d0d697d54b0cb8d4421318f4567214
+        uses: docker://ghcr.io/bjw-s/mdbook:0.4.28@sha256:6d1a6c0e03b0c25e2892be58e5423afdebdef5b55c4487e3a2f0fbb6d4bd265c
         with:
           args: bash -c "cd docs && mdbook build"