diff --git a/pkgs/by-name/pr/protoc-gen-prost-crate/package.nix b/pkgs/by-name/pr/protoc-gen-prost-crate/package.nix
index 05d442d0b9ea..97c62110931c 100644
--- a/pkgs/by-name/pr/protoc-gen-prost-crate/package.nix
+++ b/pkgs/by-name/pr/protoc-gen-prost-crate/package.nix
@@ -7,14 +7,14 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "protoc-gen-prost-crate";
-  version = "0.3.1";
+  version = "0.4.0";
 
   src = fetchCrate {
     inherit pname version;
-    sha256 = "sha256-MtGeU2PnVYPXb3nly2UaryjmjMz1lxcvYDjFiwf58FA=";
+    hash = "sha256-+TSZ2QstAF8DXsHunV/nQyqF++0bFud1ZWJQEI3JEwc=";
   };
 
-  cargoSha256 = "sha256-dcKJRX/iHIWEmBD2nTMyQozxld8b7dhxxB85quPUysg=";
+  cargoHash = "sha256-KbErgnXG11ngzLVSktuyUAupYs1ZD64z3plKVtzLx1A=";
 
   passthru.updateScript = nix-update-script { };