diff --git a/CHANGELOG.md b/CHANGELOG.md
index 84adaecc..31cd02d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `mdbook@latest` to 0.4.51.
+
 ## [2.52.1] - 2025-05-25
 
 - Update `taplo@latest` to 0.10.0.
diff --git a/manifests/mdbook.json b/manifests/mdbook.json
index 8d5fd400..4d63d21f 100644
--- a/manifests/mdbook.json
+++ b/manifests/mdbook.json
@@ -22,10 +22,32 @@
   },
   "license_markdown": "[MPL-2.0](https://github.com/rust-lang/mdBook/blob/master/LICENSE)",
   "latest": {
-    "version": "0.4.50"
+    "version": "0.4.51"
   },
   "0.4": {
-    "version": "0.4.50"
+    "version": "0.4.51"
+  },
+  "0.4.51": {
+    "x86_64_linux_musl": {
+      "etag": "0x8DD9C87BE4665CF",
+      "checksum": "b287c2f97d190c5f1b0140e383c6295d36139d5256569671b934fc2e45a2de7a"
+    },
+    "x86_64_macos": {
+      "etag": "0x8DD9C87AD8CAF22",
+      "checksum": "72f0975066dce2d6aa8fa9b44a48d69d10c02ebfc696cce6b9d73e579fc31e00"
+    },
+    "x86_64_windows": {
+      "etag": "0x8DD9C87F8F1F1DD",
+      "checksum": "23e22ce76fa8e5857ed784959390a42f9bcf5f9468233c81f71f0d1540ff9e49"
+    },
+    "aarch64_linux_musl": {
+      "etag": "0x8DD9C87C39468EE",
+      "checksum": "b79c1cc113640a3b8b13ea0eac75a326bcaf488a0b48acc5dc2d0c3d14c1c1c1"
+    },
+    "aarch64_macos": {
+      "etag": "0x8DD9C87ADC88A66",
+      "checksum": "9f9ebb8a7f3c911fe7fb3d7abf610d7505699a78710de8f55b578ca800c34283"
+    }
   },
   "0.4.50": {
     "x86_64_linux_musl": {