diff --git a/src/commands/generate/models.ts b/src/commands/generate/models.ts
index 209a20abf9a..83580214b89 100644
--- a/src/commands/generate/models.ts
+++ b/src/commands/generate/models.ts
@@ -7,7 +7,7 @@ import { generateModels, Languages, ModelinaArgs } from '@asyncapi/modelina-cli'
 import { modelsFlags } from '../../core/flags/generate/models.flags';
 import { proxyFlags } from 'core/flags/proxy.flags';
 import { HttpsProxyAgent } from 'https-proxy-agent';
-import fetch, { RequestInit } from 'node-fetch';
+import fetch, { RequestInit, Response } from 'node-fetch';
 
 export default class Models extends Command {
   static description = 'Generates typed models';
@@ -27,7 +27,8 @@ export default class Models extends Command {
     const interactive = !flags['no-interactive'];
     const proxyHost = flags['proxyHost'];
     const proxyPort = flags['proxyPort'];
-    let proxyAgent;
+    let proxyAgent: HttpsProxyAgent<string> | undefined;
+
 
     if (proxyHost && proxyPort) {
       const proxyUrl = `http://${proxyHost}:${proxyPort}`;
@@ -43,9 +44,12 @@ export default class Models extends Command {
       output = parsedArgs.output;
     }
 
-    const customFetch = proxyAgent
-    ? (url: string, options: RequestInit = {}) => fetch(url, { ...options, agent: proxyAgent })
-    : fetch;
+    const customFetch = (url: string, options: RequestInit = {}): Promise<Response> => {
+      return proxyAgent
+        ? fetch(url, { ...options, agent: proxyAgent })
+        : fetch(url, options);
+    };
+    
     const inputFile = (await load(file)) || (await load());
 
     const { document, diagnostics ,status } = await parse(this, inputFile, flags as ValidateOptions);