diff --git a/pkgs/development/tools/fundoc/default.nix b/pkgs/development/tools/fundoc/default.nix
index 47484b78759c..f7a81a27701f 100644
--- a/pkgs/development/tools/fundoc/default.nix
+++ b/pkgs/development/tools/fundoc/default.nix
@@ -2,16 +2,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "fundoc";
-  version = "0.4.1";
+  version = "0.4.2";
 
   src = fetchFromGitHub {
     owner = "csssr";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0nd03c2lz07ghaab67kgl5pw8z8mv6kwx3xzr4pqr7v5b983py6v";
+    sha256 = "sha256-qmsr4bhErpMzS71NhLep0EWimZb/S3aEhMbeBNa5y8E=";
   };
 
-  cargoSha256 = "sha256-6riBlCyqNN2nzgwfVfbRy1avT9b0PdetOrbmbaltsjE=";
+  cargoSha256 = "sha256-G2KRjkccS/rfrb7BtotbG6L4WaVnfwY1UEXLnVBLSzM=";
 
   meta = with lib; {
     description = "Language agnostic documentation generator";