diff --git a/pkgs/tools/text/mdbook/default.nix b/pkgs/tools/text/mdbook/default.nix
index 9d00c8e1fd12..155cca613a7b 100644
--- a/pkgs/tools/text/mdbook/default.nix
+++ b/pkgs/tools/text/mdbook/default.nix
@@ -2,16 +2,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "mdbook";
-  version = "0.4.26";
+  version = "0.4.28";
 
   src = fetchFromGitHub {
     owner = "rust-lang";
     repo = "mdBook";
     rev = "refs/tags/v${version}";
-    sha256 = "sha256-+K2mbVbOMQDumcPgiPtqDts/RGi+E0lF7Cftt86X/5A=";
+    sha256 = "sha256-9Otjl3JLEQo+WojUOu0XE1GH2P4LjKhaxSd1xoekXdk=";
   };
 
-  cargoHash = "sha256-C9ziW3LUBGR/K+nR3mDr62KoE9p3mn+50nfd/3NFjro=";
+  cargoHash = "sha256-TViBclvCJeoOInTt13B7297JDtRkwvOjIf6AVAbpanU=";
 
   auditable = true; # TODO: remove when this is the default