diff --git a/pkgs/development/tools/convco/default.nix b/pkgs/development/tools/convco/default.nix
index c3b0af4e822..34cc516e0bf 100644
--- a/pkgs/development/tools/convco/default.nix
+++ b/pkgs/development/tools/convco/default.nix
@@ -11,16 +11,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "convco";
-  version = "0.3.15";
+  version = "0.4.0";
 
   src = fetchFromGitHub {
     owner = "convco";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-a/C93Uuf++FIBqZSA0LaUQX4ZQoUMD2lHnV5MRlCw4g=";
+    sha256 = "sha256-Fv1yaBnfn/wik1Ix24shwfritwxno3NoeJgHPsHgZOI=";
   };
 
-  cargoHash = "sha256-JQvLezX8L2yEDyiVxH93Uk1V5qFjwXNVQWEI9ur9YOQ=";
+  cargoHash = "sha256-q0VrN+5Ypq4ga/gI5MlyRaMdD8NxzuaZ804KaRQzpRs=";
 
   nativeBuildInputs = [ cmake pkg-config ];