diff --git a/config.php b/config.php
index f5388a7..4bff80b 100644
--- a/config.php
+++ b/config.php
@@ -6,6 +6,7 @@
 define('PATH_ITEMS', PATH_METADATA.'items'.DS);
 define('PATH_AUTHORS', PATH_METADATA.'authors'.DS);
 define('CHARSET', 'UTF-8');
+define('VERSION', '1.0');
 
 // define('DOMAIN', 'http://localhost:7000');
 // define('CDN', 'http://localhost:7000/metadata/items/');
diff --git a/html/head.php b/html/head.php
index 6378255..2cc6d2a 100644
--- a/html/head.php
+++ b/html/head.php
@@ -55,10 +55,10 @@
 	?>
 
 	<!-- CSS files -->
-	<link href="<?php echo DOMAIN ?>/css/bootstrap-4.3.1.min.css" rel="stylesheet">
-	<link href="<?php echo DOMAIN ?>/css/bludit.css" rel="stylesheet">
+	<link href="<?php echo DOMAIN ?>/css/bootstrap-4.3.1.min.css?version=<?php echo VERSION ?>" rel="stylesheet">
+	<link href="<?php echo DOMAIN ?>/css/bludit.css?version=<?php echo VERSION ?>" rel="stylesheet">
 	<link href="https://fonts.googleapis.com/css?family=Open+Sans:400,700" rel="stylesheet">
-	<link href="<?php echo DOMAIN ?>/css/line-awesome/css/line-awesome-font-awesome.min.css" rel="stylesheet">
+	<link href="<?php echo DOMAIN ?>/css/line-awesome/css/line-awesome-font-awesome.min.css?version=<?php echo VERSION ?>" rel="stylesheet">
 
 	<!-- Google hreflang tag -->
 	<?php foreach ($_hreflang as $hreflang=>$href): ?>
diff --git a/index.php b/index.php
index 748ac95..5d96a22 100644
--- a/index.php
+++ b/index.php
@@ -28,8 +28,8 @@
 	<?php include(PATH_HTML.'footer.php'); ?>
 
 	<!-- Javascript stuff -->
-	<script src="<?php echo DOMAIN ?>/js/jquery-3.4.1.min.js"></script>
-	<script src="<?php echo DOMAIN ?>/js/bootstrap.bundle-4.3.1.min.js"></script>
+	<script src="<?php echo DOMAIN ?>/js/jquery-3.4.1.min.js?version=<?php echo VERSION ?>"></script>
+	<script src="<?php echo DOMAIN ?>/js/bootstrap.bundle-4.3.1.min.js?version=<?php echo VERSION ?>"></script>
 
 	<script>
 	$(document).ready(function() {