diff --git a/bucket/mdbook.json b/bucket/mdbook.json
index 3f3fb52531..52304a7551 100644
--- a/bucket/mdbook.json
+++ b/bucket/mdbook.json
@@ -1,12 +1,12 @@
 {
-    "version": "0.4.44",
+    "version": "0.4.45",
     "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/v0.4.44/mdbook-v0.4.44-x86_64-pc-windows-msvc.zip",
-            "hash": "fcbe65273c7d7760a98c03ab5ecc7ca44cd3a170eb8d0925e44fd8149fea6c2d"
+            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.45/mdbook-v0.4.45-x86_64-pc-windows-msvc.zip",
+            "hash": "ee9025ac339ce151bfb3a9dbfc7bce55580e84b2bcbc02a45a8dcca57dbd8a10"
         }
     },
     "bin": "mdbook.exe",