diff --git a/src/class/Util.ts b/src/class/Util.ts
index b2338db..851337d 100644
--- a/src/class/Util.ts
+++ b/src/class/Util.ts
@@ -32,15 +32,25 @@ export default class Util {
    * @param options childProcess.ExecOptions
    */
   public async exec(command: string, options: childProcess.ExecOptions = {}): Promise<string> {
-    const ex = promisify(childProcess.exec);
-    let result: string;
-    try {
-      const res = await ex(command, options);
-      result = `${res.stdout}${res.stderr}`;
-    } catch (err) {
-      return Promise.reject(new Error(`Command failed: ${err.cmd}\n${err.stderr}${err.stdout}`));
-    }
-    return result;
+    return new Promise((res, rej) => {
+      let error = false;
+      let output = '';
+      const writeFunction = (data: string|Buffer|Error) => {
+        if (data instanceof Error) error = true;
+        output += `${data}`;
+      };
+      const cmd = childProcess.exec(command, options);
+      cmd.stdout.on('data', writeFunction);
+      cmd.stderr.on('data', writeFunction);
+      cmd.on('error', writeFunction);
+      cmd.once('close', (code, signal) => {
+        cmd.stdout.removeListener('data', writeFunction);
+        cmd.stderr.removeListener('data', writeFunction);
+        cmd.removeListener('error', writeFunction);
+        if (error) rej(output);
+        res(output);
+      });
+    });
   }