diff --git a/bucket/mdbook.json b/bucket/mdbook.json
index 4ad2619ceb..761731a7fc 100644
--- a/bucket/mdbook.json
+++ b/bucket/mdbook.json
@@ -1,12 +1,12 @@
 {
-    "version": "0.4.24",
+    "version": "0.4.25",
     "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/v0.4.24/mdbook-v0.4.24-x86_64-pc-windows-msvc.zip",
-            "hash": "08d79f491ff2e5b6886bd2415d80cba2e41be9cf674738b76d9ac3a4c1bc8eff"
+            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.25/mdbook-v0.4.25-x86_64-pc-windows-msvc.zip",
+            "hash": "771e5aa0bffbb475a05f8fa1889550475672fbbec229bc1cfa85e16c3c8852c8"
         }
     },
     "bin": "mdbook.exe",