diff --git a/pkgs/by-name/md/mdbook-variables/package.nix b/pkgs/by-name/md/mdbook-variables/package.nix
index d25c13ed3643..f99b4d6a959c 100644
--- a/pkgs/by-name/md/mdbook-variables/package.nix
+++ b/pkgs/by-name/md/mdbook-variables/package.nix
@@ -6,16 +6,16 @@
 }:
 rustPlatform.buildRustPackage rec {
   pname = "mdbook-variables";
-  version = "0.2.4";
+  version = "0.4.0";
 
   src = fetchFromGitLab {
     owner = "tglman";
     repo = "mdbook-variables";
     rev = version;
-    hash = "sha256-whvRCV1g2avKegfQpMgYi+E6ETxT2tQqVS2SWRpAqF8=";
+    hash = "sha256-zverdL4Mrnn/8pxQk6qVyidPJNxnrmaETt+XTp64Rns=";
   };
 
-  cargoHash = "sha256-WLHXeYNfALa7GfFAHEO9PAlFKB2lbDefgAYCn6G0U6Y=";
+  cargoHash = "sha256-/zp5Qj2NUVpQqKAFgQP4QatYzg/hMJQE08ANacvNPko=";
 
   nativeInstallCheckInputs = [
     versionCheckHook