diff --git a/backend/src/routes/Users/updateUserLanguagesAndGithub.ts b/backend/src/routes/Users/updateUserLanguagesAndGithub.ts
index 0963381..57586da 100644
--- a/backend/src/routes/Users/updateUserLanguagesAndGithub.ts
+++ b/backend/src/routes/Users/updateUserLanguagesAndGithub.ts
@@ -1,4 +1,5 @@
 import { Request, Response, NextFunction } from "express";
+import mongoose from "mongoose";
 import User from "../../models/User.models";
 
 export const updateUserLanguagesAndGithub = async (
@@ -9,6 +10,14 @@ export const updateUserLanguagesAndGithub = async (
   try {
     const { _id, codingLanguages, github } = req.body;
 
+    if (!mongoose.Types.ObjectId.isValid(_id)) {
+      return res.status(400).json({ error: "Invalid user ID" });
+    }
+
+    if (!Array.isArray(codingLanguages) || typeof github !== 'string') {
+      return res.status(400).json({ error: "Invalid input data" });
+    }
+
     const updatedUser = await User.findByIdAndUpdate(
       _id,
       {