diff --git a/src/CodeGen/CodeGenerator/CoscineCodeGenerator.cs b/src/CodeGen/CodeGenerator/CoscineCodeGenerator.cs
index ec55b0f03c99b983ed5e6e3c1c16597ee286341b..aa23649ccf9e2fc3de3a897e6f9b566fa37f6b33 100644
--- a/src/CodeGen/CodeGenerator/CoscineCodeGenerator.cs
+++ b/src/CodeGen/CodeGenerator/CoscineCodeGenerator.cs
@@ -19,7 +19,7 @@ public class CoscineCodeGenerator : CodeGenerator
 
     public async override Task<string> GetClientGenerator()
     {
-        var jarDownloadLink = await _configuration.GetStringAsync("coscine/local/codegen/jarlink", "https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/6.3.0/openapi-generator-cli-6.3.0.jar");
+        var jarDownloadLink = await _configuration.GetStringAsync("coscine/local/codegen/jarlink", "https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/5.2.1/openapi-generator-cli-5.2.1.jar");
 
         using var httpClient = new HttpClient();
         var jarFileName = await _configuration.GetStringAsync("coscine/local/codegen/jarpath", "./codegen.jar");