diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index 7213b23..8e3909f 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -28,8 +28,6 @@ jobs:
   # Build job
   build:
     runs-on: ubuntu-latest
-    env:
-      MDBOOK_VERSION: 0.5.3
     steps:
       - uses: actions/checkout@v4
       - name: Install mdBook