diff --git a/bucket/mdbook.json b/bucket/mdbook.json
index bf7b551f76..8b5827cb0e 100644
--- a/bucket/mdbook.json
+++ b/bucket/mdbook.json
@@ -1,12 +1,12 @@
 {
-    "version": "0.4.42",
+    "version": "0.4.43",
     "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/v0.4.42/mdbook-v0.4.42-x86_64-pc-windows-msvc.zip",
-            "hash": "ddddd9258e24fa742b80c41fb22035a1e666691d7483ae72f7b08f5d14f41010"
+            "url": "https://github.com/rust-lang/mdBook/releases/download/v0.4.43/mdbook-v0.4.43-x86_64-pc-windows-msvc.zip",
+            "hash": "a8bbc1920e43dc88d2d10d0e3a271af863bb6f76545c6cdecc35dd1b30852a86"
         }
     },
     "bin": "mdbook.exe",