diff --git a/bl-plugins/archive/plugin.php b/bl-plugins/archive/plugin.php
index 62d20992..295da058 100644
--- a/bl-plugins/archive/plugin.php
+++ b/bl-plugins/archive/plugin.php
@@ -41,12 +41,12 @@ class pluginArchives extends Plugin
 
 		$filter = $url->filters('archive');
 
-		$html  = '<div class="plugin plugin-archives">';
-		$html .= '<h2 class="plugin-label">' . $this->getValue('label') . '</h2>';
+		$html  = '<nav class="plugin plugin-archives" aria-labelledby="plugin-archives-title">';
+		$html .= '<h2 class="plugin-label" id="plugin-archives-title">' . $this->getValue('label') . '</h2>';
 		$html .= '<div class="plugin-content">';
 		$html .= MenuHelper::getArchive($this->getValue('monthly'), "flat-list");
 		$html .= '</div>';
-		$html .= '</div>';
+		$html .= '</nav>';
 
 		return $html;
 	}
diff --git a/bl-plugins/categories/plugin.php b/bl-plugins/categories/plugin.php
index a768dd4b..0c12fe29 100644
--- a/bl-plugins/categories/plugin.php
+++ b/bl-plugins/categories/plugin.php
@@ -41,12 +41,12 @@ class pluginCategories extends Plugin
 		global $categories;
 
 		// HTML for sidebar
-		$html  = '<div class="plugin plugin-categories">';
+		$html  = '<nav class="plugin plugin-categories">';
 		$html .= '<h2 class="plugin-label">' . $this->getValue('label') . '</h2>';
 		$html .= '<div class="plugin-content">';
 		$html .= MenuHelper::getCategories($this->getValue('hideCero'), true);
 		$html .= '</div>';
-		$html .= '</div>';
+		$html .= '</nav>';
 
 		return $html;
 	}
diff --git a/bl-plugins/last-articles/plugin.php b/bl-plugins/last-articles/plugin.php
index bda3e2ea..643fd8ec 100644
--- a/bl-plugins/last-articles/plugin.php
+++ b/bl-plugins/last-articles/plugin.php
@@ -41,7 +41,7 @@ class pluginLastArticles extends Plugin
 		global $pages;
 
 		// HTML for sidebar
-		$html  = '<div class="plugin plugin-lastarticles">';
+		$html  = '<nav class="plugin plugin-lastarticles">';
 
 		// Print the label if not empty
 		$label = $this->getValue('label');
@@ -52,7 +52,7 @@ class pluginLastArticles extends Plugin
 		$html .= '<div class="plugin-content">';
 		$html .= MenuHelper::getArticles($this->getValue('numberOfItems'), false);
 		$html .= '</div>';
-		$html .= '</div>';
+		$html .= '</nav>';
 
 		return $html;
 	}
diff --git a/bl-plugins/navigation/plugin.php b/bl-plugins/navigation/plugin.php
index 883c194a..62900c25 100644
--- a/bl-plugins/navigation/plugin.php
+++ b/bl-plugins/navigation/plugin.php
@@ -44,7 +44,7 @@ class pluginNavigation extends Plugin
 		global $pages;
 
 		// HTML for sidebar
-		$html  = '<div class="plugin plugin-navigation">';
+		$html  = '<nav class="plugin plugin-navigation">';
 
 		// Print the label if not empty
 		$label = $this->getValue('label');
@@ -84,7 +84,7 @@ class pluginNavigation extends Plugin
 
 		$html .= '</ul>';
 		$html .= '</div>';
-		$html .= '</div>';
+		$html .= '</nav>';
 
 		return $html;
 	}
diff --git a/bl-plugins/static-pages/plugin.php b/bl-plugins/static-pages/plugin.php
index 59e3c919..e7a751d3 100644
--- a/bl-plugins/static-pages/plugin.php
+++ b/bl-plugins/static-pages/plugin.php
@@ -44,7 +44,7 @@ class pluginStaticPages extends Plugin
 		global $pages;
 
 		// HTML for sidebar
-		$html  = '<div class="plugin plugin-static-pages">';
+		$html  = '<nav class="plugin plugin-static-pages">';
 
 		// Print the label if not empty
 		$label = $this->getValue('label');
@@ -55,7 +55,7 @@ class pluginStaticPages extends Plugin
 		$html .= '<div class="plugin-content">';
 		$html .= MenuHelper::getStatics(-1, $this->getValue('homeLink'));
 		$html .= '</div>';
-		$html .= '</div>';
+		$html .= '</nav>';
 
 		return $html;
 	}
diff --git a/bl-plugins/tags/plugin.php b/bl-plugins/tags/plugin.php
index b88a741a..9ceaeda8 100644
--- a/bl-plugins/tags/plugin.php
+++ b/bl-plugins/tags/plugin.php
@@ -31,12 +31,12 @@ class pluginTags extends Plugin
 
 		$filter = $url->filters('tag');
 
-		$html  = '<div class="plugin plugin-tags">';
+		$html  = '<nav class="plugin plugin-tags">';
 		$html .= '<h2 class="plugin-label">' . $this->getValue('label') . '</h2>';
 		$html .= '<div class="plugin-content">';
 		$html .= MenuHelper::getTags(1, "flat-list");
 		$html .= '</div>';
-		$html .= '</div>';
+		$html .= '</nav>';
 
 		return $html;
 	}
diff --git a/bl-themes/defaultTheme/css/style.css b/bl-themes/defaultTheme/css/style.css
index deafdfa7..77c1fd90 100755
--- a/bl-themes/defaultTheme/css/style.css
+++ b/bl-themes/defaultTheme/css/style.css
@@ -136,28 +136,28 @@ aside {
 	}
 }
 
-nav ul {
+header#main-header nav ul {
 	display: flex;
 	flex-wrap: wrap;
 	padding: .5rem 0;
 }
 
-nav ul li {
+header#main-header nav ul li {
 	list-style-type: none;
 	margin: 0
 }
 
-nav ul li a,
-nav ul li span {
+header#main-header nav ul li a,
+header#main-header nav ul li span {
 	padding: .5rem
 }
 
 
-nav ul li.separator {
+header#main-header nav ul li.separator {
 	margin-right: auto
 }
 
-nav ul li.separator-left {
+header#main-header nav ul li.separator-left {
 	margin-left: auto
 }
 
diff --git a/bl-themes/defaultTheme/php/header.php b/bl-themes/defaultTheme/php/header.php
index 69eca0e5..4b4e73ba 100644
--- a/bl-themes/defaultTheme/php/header.php
+++ b/bl-themes/defaultTheme/php/header.php
@@ -1,5 +1,5 @@
 <header id="main-header">
-    <nav><?php echo MenuHelper::getStatics(6, true, "", "", "active", '<li class="separator-left"><a href="'.Theme::siteUrl().'rss.xml">RSS</a></li>'); ?></nav>
+    <nav aria-label="<?php $language->p('Pages') ?>"><?php echo MenuHelper::getStatics(6, true, "", "", "active", '<li class="separator-left"><a href="'.Theme::siteUrl().'rss.xml">RSS</a></li>'); ?></nav>
     <hgroup id="title-container">
         <?php $logo = MediaHelper::getLogo(); ?>
         <?php if ($logo) : ?>
@@ -9,5 +9,5 @@
             <p><?php echo $site->description() ?></p>
         <?php endif ?>
     </hgroup>
-    <nav><?php echo MenuHelper::getCategories(true, false); ?></nav>
+    <nav aria-label="<?php $language->p('Categories') ?>"><?php echo MenuHelper::getCategories(true, false); ?></nav>
 </header>
\ No newline at end of file