diff --git a/pkgs/by-name/pr/protoc-gen-prost/package.nix b/pkgs/by-name/pr/protoc-gen-prost/package.nix
index 7c92095fbeee..8429f8ba27c1 100644
--- a/pkgs/by-name/pr/protoc-gen-prost/package.nix
+++ b/pkgs/by-name/pr/protoc-gen-prost/package.nix
@@ -7,14 +7,14 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "protoc-gen-prost";
-  version = "0.3.1";
+  version = "0.4.0";
 
   src = fetchCrate {
     inherit pname version;
-    hash = "sha256-ma9sdt3/uq06BMELwsNadMkiEfstQhA4DAQEPdizZJM=";
+    hash = "sha256-Bz5/LyKludw0Tz3r+xr4DMRdMSz/nRzjs7Q66z1PrTU=";
   };
 
-  cargoHash = "sha256-pJDrwX5uDIrycxtmbds8l4wadZE0RdgmNpMwVkUGJDs=";
+  cargoHash = "sha256-X6yEJBgW9XzCNSxEQYj6LdPjbCPyh4SnKwdA/+sNNeg=";
 
   passthru.updateScript = nix-update-script { };