diff --git a/pkgs/tools/text/mdbook-mermaid/default.nix b/pkgs/tools/text/mdbook-mermaid/default.nix
index 222c3ddf936..9ca9669fa20 100644
--- a/pkgs/tools/text/mdbook-mermaid/default.nix
+++ b/pkgs/tools/text/mdbook-mermaid/default.nix
@@ -1,24 +1,32 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, CoreServices }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, rustPlatform
+, CoreServices
+}:
 
 rustPlatform.buildRustPackage rec {
   pname = "mdbook-mermaid";
-  version = "0.12.1";
+  version = "0.12.6";
 
   src = fetchFromGitHub {
     owner = "badboy";
     repo = pname;
-    rev = "v${version}";
-    hash = "sha256-22JmV4cFfUTwiweQP0Em2VbqmTUui2yWnbhKagprQ4Q=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-1mSSnAfsg9AEnDAgINrSLIeu9O2vLqchZPSH12cjATk=";
   };
 
-  cargoHash = "sha256-tztzmfWOtqFGWERMWgBSAqvT+hKfhBWL9KW4awixXk0=";
+  cargoHash = "sha256-9PMBHVpf8bDuSIYKrIFZjmBE2icejPTML+hhZ4DLq/Y=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.isDarwin [
+    CoreServices
+  ];
 
   meta = with lib; {
     description = "A preprocessor for mdbook to add mermaid.js support";
     homepage = "https://github.com/badboy/mdbook-mermaid";
-    license = [ licenses.mpl20 ];
+    changelog = "https://github.com/badboy/mdbook-mermaid/blob/v${version}/CHANGELOG.md";
+    license = licenses.mpl20;
     maintainers = with maintainers; [ xrelkd ];
   };
 }