diff --git a/404.html b/404.html
index d464c2f..d616a37 100644
--- a/404.html
+++ b/404.html
@@ -1,8 +1,27 @@
 <html lang="en">
 <head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Furkan Karlıoğlu - 404 Page</title>
+    <link href="img/icon.ico" rel="shortcut icon" type="image/x-icon">
+    <link rel="manifest" href="/manifest.json">
+    
+    <meta charset="UTF-8">
+    <meta http-equiv="X-XSS-Protection" content="1; mode=block">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="robots" content="INDEX, FOLLOW">
+    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+    <meta name="publisher" content="https://furk4ngg.github.io">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0, user-scalable=yes">
+    <meta name="theme-color" content="#282c34">
+    <meta name="apple-mobile-web-app-status-bar-style" content="default">
+    <meta name="apple-mobile-web-app-capable" content="yes">
+    <meta name="apple-mobile-web-app-title" content="Furkan Karlıoğlu">
+    <meta name="keywords" content="Furkan Karlioglu,Software,Program Languages,Artificial Intelligence,Cybersecurity,Mobile App,Mobile App Development,Robotics Coding,Portfolio,Experience,Enterprising,Software Developer">
+    <meta name="description" content="[Furkan Karlioglu-Software Engineer]Explore my site to see my skills in software development, IoT and cybersecurity.Visit my website to explore innovation.🚀"/>
+    <meta property="og:description" content="Furkan Karlioglu's personal web site." />
+    <meta name="author" content="Furkan KARLIOĞLU">
+    <meta name="viewport" content="width=device-width">
+    <link rel="canonical" href="https://furk4ngg.github.io/404.html">
+    <link href='img/icon.ico' rel='apple-touch-icon'/>
     <script src="https://d3js.org/d3.v6.min.js"></script>
     <style>
         body { margin: 0; background: #282c34; overflow: hidden; }
