diff --git a/index.js b/index.js
index dfbfbc5..42d6503 100644
--- a/index.js
+++ b/index.js
@@ -1,25 +1,29 @@
-const express = require('express');
-const app = express();
-const PORT = 3000;
+const express = require('express')
+const cors = require('cors')
 
-const fs = require('fs');
-const path = require('path');
-const GeoJsonGeometriesLookup = require("geojson-geometries-lookup");
+const app = express()
+app.use(cors())
 
-const lookupTable = require('./rep-lookup');
+const PORT = 3000
 
-app.use(express.static(path.join(__dirname, 'public')));
+const fs = require('fs')
+const path = require('path')
+const GeoJsonGeometriesLookup = require("geojson-geometries-lookup")
+
+const lookupTable = require('./rep-lookup')
+
+app.use(express.static(path.join(__dirname, 'public')))
 
 app.use('/rep', async (req, res) => {
-    const lat = parseFloat(req.query.lat);
-    const lon = parseFloat(req.query.lon);
+    const lat = parseFloat(req.query.lat)
+    const lon = parseFloat(req.query.lon)
 
     if (!lat || !lon) return
 
-    const f = fs.readFileSync(path.join(__dirname, 'public/circonscriptions-legislatives.json'), 'utf-8');
+    const f = fs.readFileSync(path.join(__dirname, 'public/circonscriptions-legislatives.json'), 'utf-8')
     const data = JSON.parse(f)
     
-    gl = new GeoJsonGeometriesLookup(data);
+    gl = new GeoJsonGeometriesLookup(data)
 
     const pos = {
         type: "Point",
@@ -28,9 +32,16 @@ app.use('/rep', async (req, res) => {
 
     const code = gl.getContainers(pos).features[0]?.properties["REF"]
 
-    const repFile = fs.readFileSync(path.join(__dirname, `public/reps/${lookupTable[code]}.json`), 'utf-8');
+    if (!code) {
+        res.json({
+            "message": "The requested data couldn't be found. Maybe it was moved or the data isn't generated properly."
+        }).status(404).end();
+        return
+    }
 
-    res.end(repFile);
+    const repFile = fs.readFileSync(path.join(__dirname, `public/reps/${lookupTable[code]}.json`), 'utf-8')
+
+    res.end(repFile)
 
     /**
      * GENERATE INITIAL DATA
@@ -40,10 +51,10 @@ app.use('/rep', async (req, res) => {
     // const output = {}
 
     // for (let i = 500; i < lookupTable.length; i++) {
-    //     const repId = lookupTable[i];
+    //     const repId = lookupTable[i]
     //     console.log(repId)
 
-    //     const response = await fetch(`https://www.assemblee-nationale.fr/dyn/deputes/${repId}`);
+    //     const response = await fetch(`https://www.assemblee-nationale.fr/dyn/deputes/${repId}`)
     //     const body = await response.text()
 
     //     const depRegex = new RegExp(/(data-content=\"\/dyn\/carte\/departement\/)([A-Za-z0-9]{2,})/g)
@@ -69,7 +80,7 @@ app.use('/rep', async (req, res) => {
     //     output[`${rep.departement}-${rep.circo}`] = repId
     // }
 
-    // res.json(output);
+    // res.json(output)
 })
 
 app.listen(PORT, () => console.log(`Server listening on port: ${PORT}`));
diff --git a/package-lock.json b/package-lock.json
index c0048ae..b4c29de 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,6 +6,7 @@
         "": {
             "license": "ISC",
             "dependencies": {
+                "cors": "^2.8.5",
                 "express": "^4.18.2",
                 "geojson-geometries-lookup": "^0.5.0"
             }
@@ -183,6 +184,18 @@
             "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
             "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
         },
+        "node_modules/cors": {
+            "version": "2.8.5",
+            "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
+            "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
+            "dependencies": {
+                "object-assign": "^4",
+                "vary": "^1"
+            },
+            "engines": {
+                "node": ">= 0.10"
+            }
+        },
         "node_modules/debug": {
             "version": "2.6.9",
             "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -473,6 +486,14 @@
                 "node": ">= 0.6"
             }
         },
+        "node_modules/object-assign": {
+            "version": "4.1.1",
+            "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
+            "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
+            "engines": {
+                "node": ">=0.10.0"
+            }
+        },
         "node_modules/object-inspect": {
             "version": "1.12.3",
             "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.3.tgz",
diff --git a/package.json b/package.json
index f5cdec9..6481303 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
     "author": "",
     "license": "ISC",
     "dependencies": {
+        "cors": "^2.8.5",
         "express": "^4.18.2",
         "geojson-geometries-lookup": "^0.5.0"
     },