diff --git a/bucket/mdbook.json b/bucket/mdbook.json
index 5af3343ec0..8ddf621bc2 100644
--- a/bucket/mdbook.json
+++ b/bucket/mdbook.json
@@ -1,12 +1,12 @@
 {
-    "version": "0.4.51",
+    "version": "0.4.52",
     "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/v0.4.51/mdbook-v0.4.51-x86_64-pc-windows-msvc.zip",
-            "hash": "23e22ce76fa8e5857ed784959390a42f9bcf5f9468233c81f71f0d1540ff9e49"
+            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.52/mdbook-v0.4.52-x86_64-pc-windows-msvc.zip",
+            "hash": "33510a5745c593e06f4b8e21f531d9204c6f4444846b4bd57994e82a7bdfec98"
         }
     },
     "bin": "mdbook.exe",