diff --git a/assets/js/developer_tools.js b/assets/js/developer_tools.js
new file mode 100644
index 00000000..7459ca03
--- /dev/null
+++ b/assets/js/developer_tools.js
@@ -0,0 +1,23 @@
+//Right-click disable
+document.addEventListener('contextmenu', event => event.preventDefault());
+
+// Disable common keyboard shortcuts for developer tools
+    document.addEventListener('keydown', function(event) {
+      if (event.ctrlKey && (event.key === 'I' || event.key === 'i' || event.key === 'J' || event.key === 'j' || event.key === 'U' || event.key === 'u')) {
+        event.preventDefault();
+      }
+      if (event.key === 'F12') {
+        event.preventDefault();
+      }
+    });
+
+    // Detect developer tools opening
+    (function() {
+      const element = new Image();
+      Object.defineProperty(element, 'id', {
+        get: function() {
+          alert('Developer tools opened!');
+        }
+      });
+      console.log(element);
+    })();
\ No newline at end of file
diff --git a/header.php b/header.php
index 469cf71f..e062a9aa 100644
--- a/header.php
+++ b/header.php
@@ -6,7 +6,7 @@
         <span>Xeorl</span>
     </div>
     <div class="version-number">
-            <span>1.2.0</span>
+            <span>1.2.1</span>
         </div>
     <nav>
         <ul>
@@ -18,4 +18,4 @@
     </nav>
 </div>
 </header>
-<script src="assets/js/header.js"></script>
+<script src="assets/js/developer_tools.js"></script>
diff --git a/index.php b/index.php
index 20814aeb..52592a2a 100644
--- a/index.php
+++ b/index.php
@@ -104,5 +104,6 @@ include "header.php";
     </main>
     <?php include 'footer.php'; ?>
     <script src="assets/js/home.js"></script>
+    <script src="assets/js/developer_tools.js"></script>
 </body>
 </html>