diff --git a/bucket/mdbook.json b/bucket/mdbook.json
index 9276aecaaf..c70257e8ae 100644
--- a/bucket/mdbook.json
+++ b/bucket/mdbook.json
@@ -1,12 +1,12 @@
 {
-    "version": "0.4.14",
+    "version": "0.4.15",
     "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/v0.4.14/mdbook-v0.4.14-x86_64-pc-windows-msvc.zip",
-            "hash": "374aa2b79228a0cf4c7be9417bd7598287d125509e09e9e701cfa1c9fcd881af"
+            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.15/mdbook-v0.4.15-x86_64-pc-windows-msvc.zip",
+            "hash": "15621bd351290897b9823666a888f3d87e5f395f9f8bae6f49143778aec650d1"
         }
     },
     "bin": "mdbook.exe",