diff --git a/package.json b/package.json
index 4c8eb5b..830f0e4 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "build": "npm run clean && npx tsc && npm run copyfiles",
     "clean": "npx rimraf --glob dist/",
     "copyfiles": "mkdir \"dist\\api\\v1\\core\\db\" && cp ./src/api/v1/core/db/ ./dist/api/v1/core -r",
-    "dev": "npm run copyfiles && tsc-watch --onSuccess \"node ./dist/index.js\"",
+    "dev": "npm run clean && npm run copyfiles && tsc-watch --onSuccess \"node ./dist/index.js\"",
     "start": "node ./dist/index.js",
     "test": "vitest",
     "test:coverage": "vitest run --coverage"
@@ -48,4 +48,4 @@
     "typescript": "^4.9.5",
     "vitest": "^1.6.0"
   }
-}
+}
\ No newline at end of file
diff --git a/src/api/v1/core b/src/api/v1/core
index 01bff5d..7ac5403 160000
--- a/src/api/v1/core
+++ b/src/api/v1/core
@@ -1 +1 @@
-Subproject commit 01bff5da28bf55b2e376e6b7f20494b3534a5cc7
+Subproject commit 7ac5403d1eedab16dd3d995d5de5aca6bd9cc45b
diff --git a/src/api/v1/verse/verse.ts b/src/api/v1/verse/verse.ts
index 1ee9827..be6b38b 100644
--- a/src/api/v1/verse/verse.ts
+++ b/src/api/v1/verse/verse.ts
@@ -1,7 +1,7 @@
-import express, { Request, Response, Router } from 'express'
-import axios from 'axios';
-import * as cheerio from 'cheerio';
-import { getVerse } from '../core/functions/verse';
+import express, { Request, Response, Router } from "express";
+import axios from "axios";
+import * as cheerio from "cheerio";
+import { getVerse } from "../core/functions/verse";
 
 // Router
 const router: Router = express.Router();
@@ -52,25 +52,34 @@ const router: Router = express.Router();
  *               example: OK
  */
 router.get("/", async (req: Request, res: Response) => {
-    let book = req.query.book as string;
-    const chapter = req.query.chapter ??= "1";
-    const verses = req.query.verses ??= "1" as string;
-    let version = req.query.version ??= "KJV" as string;
+  let book = req.query.book as string;
+  const chapter = (req.query.chapter ??= "1");
+  const verses = (req.query.verses ??= "-1" as string);
+  let version = (req.query.version ??= "KJV" as string);
 
-    function apiError(code: number, message: string) {
-        res.status(code).send({
-            "code": code,
-            "message": message
-        });
-    }
-    if (!book) return apiError(400, "Missing field 'book'");
-    if (isNaN(parseInt(chapter.toString()))) return apiError(400, "Chapter must be a number");
-    if (isNaN(parseInt(verses.toString()))) return apiError(400, "Verses must be a number");
+  function apiError(code: number, message: string) {
+    res.status(code).send({
+      code: code,
+      message: message,
+    });
+  }
+  if (!book) return apiError(400, "Missing field 'book'");
+  if (isNaN(parseInt(chapter.toString())))
+    return apiError(400, "Chapter must be a number");
+  if (isNaN(parseInt(verses.toString())))
+    return apiError(400, "Verses must be a number");
+  if (parseInt(chapter.toString()) <= 0)
+    return apiError(400, "Chapter must be greater than 0");
 
-    const data = await getVerse(book, chapter.toString(), verses.toString(), version.toString());
+  const data = await getVerse(
+    book,
+    chapter.toString(),
+    verses.toString(),
+    version.toString()
+  );
 
-    if (data?.code) return apiError(data.code, data.message);
-    else return res.status(200).send(data);
-})
+  if (data?.code) return apiError(data.code, data.message);
+  else return res.status(200).send(data);
+});
 
 module.exports = router;