diff --git a/bucket/mdbook.json b/bucket/mdbook.json
index 794f617cc5..10d68d50e0 100644
--- a/bucket/mdbook.json
+++ b/bucket/mdbook.json
@@ -1,12 +1,12 @@
 {
-    "version": "0.4.28",
+    "version": "0.4.29",
     "description": "Create a book from markdown files.",
     "homepage": "https://github.com/rust-lang/mdBook",
     "license": "MPL-2.0",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.28/mdbook-v0.4.28-x86_64-pc-windows-msvc.zip",
-            "hash": "996bc212502e51da1d69090134d13cf51ff21e478be9b7e2aeb1d330c7865e35"
+            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.29/mdbook-v0.4.29-x86_64-pc-windows-msvc.zip",
+            "hash": "ff2b491b41ecd65350137278e72f8ef10c161374cd47c474fc2a196c37f5e03e"
         }
     },
     "bin": "mdbook.exe",