diff --git a/pkgs/tools/networking/openapi-generator-cli/default.nix b/pkgs/tools/networking/openapi-generator-cli/default.nix
index 020feb2c43b9..4b30c8979678 100644
--- a/pkgs/tools/networking/openapi-generator-cli/default.nix
+++ b/pkgs/tools/networking/openapi-generator-cli/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, jre, makeWrapper }:
 
 stdenv.mkDerivation rec {
-  version = "3.3.4";
+  version = "4.0.0";
   pname = "openapi-generator-cli";
 
   jarfilename = "${pname}-${version}.jar";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "http://central.maven.org/maven2/org/openapitools/${pname}/${version}/${jarfilename}";
-    sha256 = "24cb04939110cffcdd7062d2f50c6f61159dc3e0ca3b8aecbae6ade53ad3dc8c";
+    sha256 = "0011cks5qizq1rl8iwm683gmb9dlx134p8az32vqm8sbivggv9c1";
   };
 
   phases = [ "installPhase" ];