diff --git a/bun.lockb b/bun.lockb
index c7e7dac..68a7243 100644
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000..b87e67e
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,17 @@
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+import { defineConfig } from "eslint/config";
+
+export default defineConfig([
+  {
+    files: ["src/**/*.{js,mjs,cjs,ts,mts,cts}"],
+    plugins: { js },
+    extends: ["js/recommended"],
+  },
+  {
+    files: ["src/**/*.{js,mjs,cjs,ts,mts,cts}"],
+    languageOptions: { globals: globals.node },
+  },
+  tseslint.configs.recommended,
+]);
diff --git a/package.json b/package.json
index 54a28cd..5c89849 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "build": "bun build ./src/index.ts --compile --target bun --minify-whitespace --minify-syntax --minify-identifiers --outfile dist/server",
     "dev": "bun run --watch src/index.ts",
     "map": "madge --image structure.svg src/index.ts",
+    "lint": "bunx eslint",
     "route:sync": "bun run ./scripts/sync-routes.ts",
     "env:publish": "bun run ./scripts/create-example-env.ts"
   },
@@ -27,8 +28,12 @@
     "ua-parser-js": "^2.0.3"
   },
   "devDependencies": {
+    "@eslint/js": "^9.29.0",
     "bun-types": "latest",
-    "prisma": "^6.7.0"
+    "eslint": "^9.29.0",
+    "globals": "^16.2.0",
+    "prisma": "^6.7.0",
+    "typescript-eslint": "^8.34.1"
   },
   "module": "src/index.js"
 }
diff --git a/src/helpers/callback/httpResponse.ts b/src/helpers/callback/httpResponse.ts
index 98d687b..69fd05a 100644
--- a/src/helpers/callback/httpResponse.ts
+++ b/src/helpers/callback/httpResponse.ts
@@ -1,3 +1,5 @@
+import { Context } from "elysia";
+
 /**
  * Returns a standardized response for write operations (POST, PUT, DELETE).
  * Only includes data in the response during development.
@@ -9,21 +11,19 @@
  *
  * @returns An object with `status`, `message`, and optionally `data` (in development only).
  */
-export function returnWriteResponse(
-  set: any,
+export function returnWriteResponse<T>(
+  set: Context["set"],
   status: number,
   message?: string,
-  data?: any
+  data?: T
 ) {
   set.status = status;
 
-  const response: Record<string, any> = {
+  return {
     status,
     message,
+    ...(process.env.APP_ENV === "development" && { data }),
   };
-  if (process.env.APP_ENV === "development") response.data = data;
-
-  return response;
 }
 
 /**
@@ -37,11 +37,11 @@ export function returnWriteResponse(
  *
  * @returns An object with `status`, `message`, and `data`.
  */
-export function returnReadResponse(
-  set: any,
+export function returnReadResponse<T>(
+  set: Context["set"],
   status: number,
   message: string,
-  data: any
+  data: T
 ) {
   set.status = status;
   return {
@@ -61,20 +61,20 @@ export function returnReadResponse(
  *
  * @returns An object with `status`, `message`, and optionally `error_details` (in development only).
  */
-export function returnErrorResponse(
-  set: any,
+export function returnErrorResponse<T>(
+  set: Context["set"],
   status: number,
   message: string,
-  errorDetails?: any
+  errorDetails?: T
 ) {
   set.status = status;
 
-  const response: Record<string, any> = {
+  return {
     status: "error",
     message,
+    ...(process.env.APP_ENV === "development" &&
+      errorDetails && {
+        error_details: errorDetails,
+      }),
   };
-  if (process.env.APP_ENV === "development" && errorDetails)
-    response.error_details = errorDetails;
-
-  return response;
 }