diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 066afca..e7ed99b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,7 +4,7 @@ on:
   merge_group:
 
 env:
-  MDBOOK_VERSION: 0.4.45
+  MDBOOK_VERSION: 0.5.1
 
 jobs:
   test: