diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a599da..3f44c01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+# v1.7.0
+## 03/21/2019
+
+1. [](#new)
+    * Set Dependency of Grav 1.5.10+ which has support for new **Deferred Block** Twig extension
+    * Implement assets rendering using **Deferred Block** Twig extension 
+    
 # v1.6.2
 ## 12/20/2016
 
diff --git a/blueprints.yaml b/blueprints.yaml
index 1211fe9..6e1fe18 100644
--- a/blueprints.yaml
+++ b/blueprints.yaml
@@ -1,5 +1,5 @@
 name: Deliver
-version: 1.6.2
+version: 1.7.0
 description: "Deliver theme is a port of the Michael Reimer's Deliver Free PSD theme."
 icon: newspaper-o
 author:
@@ -11,6 +11,8 @@ demo: http://demo.getgrav.org/deliver-skeleton/
 keywords: deliver, theme, modern, fast, responsive, html5, css3
 bugs: https://github.com/getgrav/grav-theme-deliver/issues
 license: MIT
+dependencies:
+  - { name: grav, version: '>=1.5.10' }
 
 form:
   validation: loose
diff --git a/templates/item.html.twig b/templates/item.html.twig
index 6dbff5c..d4bdca1 100644
--- a/templates/item.html.twig
+++ b/templates/item.html.twig
@@ -19,8 +19,10 @@
             <h1>{{ page.title }}</h1>
         </div>
         {% endif %}
-    
-        {% include 'partials/breadcrumbs.html.twig' %}
+
+        {% if config.plugins.breadcrumbs.enabled %}
+            {% include 'partials/breadcrumbs.html.twig' %}
+        {% endif %}
 		
 		<div class="blog-content-item g-grid pure-g-r">
 			<div id="item" class="g-block pure-u-2-3">
diff --git a/templates/partials/archives.html.twig b/templates/partials/archives.html.twig
index 4f1a3af..9d3eaf2 100644
--- a/templates/partials/archives.html.twig
+++ b/templates/partials/archives.html.twig
@@ -1,7 +1,7 @@
 <ul class="archives">
 {% for month,items in archives_data %}
     <li>
-    	<a href="{{ base_url }}/archives_month:{{ month|date('M_Y')|lower|e('url') }}">
+    	<a href="{{ base_url }}/archives_month{{ config.system.param_sep }}{{ month|date('M_Y')|lower|e('url') }}">
         <span class="archive_date">{{ month }}</span>
         {% if archives_show_count %}
         <span>({{ items|length }})</span>
diff --git a/templates/partials/base.html.twig b/templates/partials/base.html.twig
index f416894..738393e 100644
--- a/templates/partials/base.html.twig
+++ b/templates/partials/base.html.twig
@@ -1,6 +1,6 @@
 {% set theme_config = attribute(config.themes, config.system.pages.theme) %}
 <!DOCTYPE html>
-<html lang="{{ grav.language.getLanguage ?: 'en' }}">
+<html lang="{{ grav.language.getActive ?: grav.config.site.default_lang }}">
 <head>
 {% block head %}
     <meta charset="utf-8" />
@@ -25,7 +25,6 @@
             {% do assets.addCss('theme://js/html5shiv-printshiv.min.js') %}
         {% endif %}
     {% endblock %}
-    {{ assets.css() }}
 
     {% block javascripts %}
         {% do assets.add('jquery', 101) %}
@@ -38,7 +37,11 @@
             {% do assets.addJs('theme://js/fixed-header.js') %}
         {% endif %}
     {% endblock %}
-    {{ assets.js() }}
+
+    {% block assets deferred %}
+        {{ assets.css()|raw }}
+        {{ assets.js()|raw }}
+    {% endblock %}
 
 {% endblock head%}
 </head>
@@ -82,7 +85,7 @@
         </div>
     </div>
     {% block bottom %}
-    {{ assets.js('bottom') }}
+    {{ assets.js('bottom')|raw }}
     <script>
     $(function () {
         $(document).ready(function() {
diff --git a/templates/partials/metadata.html.twig b/templates/partials/metadata.html.twig
deleted file mode 100644
index 2f08a0e..0000000
--- a/templates/partials/metadata.html.twig
+++ /dev/null
@@ -1,3 +0,0 @@
-{% for meta in page.metadata %}
-<meta {% if meta.name %}name="{{ meta.name }}" {% endif %}{% if meta.http_equiv %}http-equiv="{{ meta.http_equiv }}" {% endif %}{% if meta.charset %}charset="{{ meta.charset }}" {% endif %}{% if meta.property %}property="{{ meta.property }}" {% endif %}{% if meta.content %}content="{{ meta.content }}" {% endif %}/>
-{% endfor %}
diff --git a/templates/partials/search.html.twig b/templates/partials/search.html.twig
index 792ce24..5d6a8f2 100644
--- a/templates/partials/search.html.twig
+++ b/templates/partials/search.html.twig
@@ -7,7 +7,7 @@
         input.on('keypress', function(event) {
             if (event.which == 13 && input.val().length > 3) {
                 event.preventDefault();
-                window.location.href = input.data('search-input') + ':' + input.val();
+                window.location.href = input.data('search-input') + '{{ config.system.param_sep }}' + input.val();
             }
         });
     });
diff --git a/templates/partials/simplesearch_searchbox.html.twig b/templates/partials/simplesearch_searchbox.html.twig
index 0c060f1..a87fb46 100644
--- a/templates/partials/simplesearch_searchbox.html.twig
+++ b/templates/partials/simplesearch_searchbox.html.twig
@@ -6,7 +6,7 @@ jQuery(document).ready(function($){
     input.on('keypress', function(event) {
         if (event.which == 13 && input.val().length > 3) {
             event.preventDefault();
-            window.location.href = input.data('searchsidebar-input') + ':' + input.val();
+            window.location.href = input.data('searchsidebar-input') + '{{ config.system.param_sep }}' + input.val();
         }
     });
 });
