diff --git a/pkgs/by-name/md/mdbook/package.nix b/pkgs/by-name/md/mdbook/package.nix
index 57ad9750434f..c08a936952c3 100644
--- a/pkgs/by-name/md/mdbook/package.nix
+++ b/pkgs/by-name/md/mdbook/package.nix
@@ -7,7 +7,7 @@
   installShellFiles,
 }:
 let
-  version = "0.4.48";
+  version = "0.4.49";
 in
 rustPlatform.buildRustPackage rec {
   inherit version;
@@ -17,11 +17,11 @@ rustPlatform.buildRustPackage rec {
     owner = "rust-lang";
     repo = "mdBook";
     tag = "v${version}";
-    hash = "sha256-ZCV8BSoaYIhNZV3Spsd7rsp8D2zTZSdWMuicQrgax2I=";
+    hash = "sha256-X+ptqzAOjCX2Tt5jDfH/jdUy99WrITGfzDj+F2DoI5w=";
   };
 
   useFetchCargoVendor = true;
-  cargoHash = "sha256-ZpfzAzqVL7/GaI4C7X0UqZAPFT/Y/OCQ53wDcmgM2zI=";
+  cargoHash = "sha256-ZPJkSMcxyTOivfwThPfaO6oRkfewH048rrCDCwCtE8c=";
 
   nativeBuildInputs = [ installShellFiles ];