diff --git a/pkgs/tools/text/mdbook/default.nix b/pkgs/tools/text/mdbook/default.nix
index c6a6a053680a..98fb6e69be51 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 = "0.4.5";
+  version = "0.4.6";
 
   src = fetchFromGitHub {
     owner = "rust-lang-nursery";
     repo = "mdBook";
     rev = "v${version}";
-    sha256 = "11v2x0q8pn7hbmznqy872ksr7szyiki9cfhapymjhkf5nwfvcdbb";
+    sha256 = "sha256-cS2fME3X8bFmEz6czoL+2ZFbflJP58+lIeC5SVleCNg=";
   };
 
-  cargoSha256 = "1psgqj04hzv7p18h4phsahxg4rj9yz38b8mh111k6l8m4r83kd75";
+  cargoSha256 = "sha256-iuJyprLp6HofcdH0NgNK2Vl+1FtdAvZPcltPUb5B2XU=";
 
   buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];