diff --git a/pkgs/tools/text/mdbook-mermaid/default.nix b/pkgs/tools/text/mdbook-mermaid/default.nix
index 1977fcd4efe8..cf74ace516e8 100644
--- a/pkgs/tools/text/mdbook-mermaid/default.nix
+++ b/pkgs/tools/text/mdbook-mermaid/default.nix
@@ -1,26 +1,17 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, rustPlatform, CoreServices }:
+{ lib, stdenv, fetchFromGitHub, rustPlatform, CoreServices }:
 
 rustPlatform.buildRustPackage rec {
   pname = "mdbook-mermaid";
-  version = "0.11.2";
+  version = "0.12.0";
 
   src = fetchFromGitHub {
     owner = "badboy";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-zXgXgcMF7MOa9Vx3rhv9aavqRCfMcyRLtaWEvYlyaTs=";
+    hash = "sha256-1w132lpkn0m2ZoMyFKFGjwn9Gd3UDksEKr5vq8l4ANQ=";
   };
 
-  cargoPatches = [
-    # https://github.com/badboy/mdbook-mermaid/pull/23
-    (fetchpatch {
-      name = "update-mdbook-for-rust-1.64.patch";
-      url = "https://github.com/badboy/mdbook-mermaid/commit/5a3432d1b28ef9a065dd37aa77b82a3593358793.patch";
-      hash = "sha256-NkCxGmRdwJ+jdkgxp5gWfGpgpLpEpKUd44LyPx0kyEE=";
-    })
-  ];
-
-  cargoHash = "sha256-IkMBnBuobrJzR6+030/Wfbu2ZCjvFnjBV+6sSWdiNUw=";
+  cargoHash = "sha256-OKE8RcCE4pIRtQDW7KNzUVrNpyZzWg6QHchJg0XWmYQ=";
 
   buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];