diff --git a/pkgs/tools/networking/openapi-generator-cli/default.nix b/pkgs/tools/networking/openapi-generator-cli/default.nix
index 69ab1b35c141..70496caf992c 100644
--- a/pkgs/tools/networking/openapi-generator-cli/default.nix
+++ b/pkgs/tools/networking/openapi-generator-cli/default.nix
@@ -1,7 +1,7 @@
 { callPackage, lib, stdenv, fetchurl, jre, makeWrapper }:
 
 let this = stdenv.mkDerivation rec {
-  version = "6.3.0";
+  version = "6.4.0";
   pname = "openapi-generator-cli";
 
   jarfilename = "${pname}-${version}.jar";
@@ -12,7 +12,7 @@ let this = stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "mirror://maven/org/openapitools/${pname}/${version}/${jarfilename}";
-    sha256 = "sha256-1xTXvuxQCksCT+pj4+eHyb8fAc4YcK9Tn3xIijB7P1s=";
+    sha256 = "sha256-Na6tMA4MlGn72dMM9G9BU4l9yygpEgkcpOySEtzp0VE=";
   };
 
   dontUnpack = true;