diff --git a/composer.json b/composer.json
index 01121e7..f5ae9a0 100644
--- a/composer.json
+++ b/composer.json
@@ -15,8 +15,8 @@
     ],
     "require": {
         "php": ">=5.4.0",
-        "dioscouri/f3-lib": "dev-master",
-        "dioscouri/f3-admin": "dev-master"
+        "dioscouri/f3-lib": ">=v0.8",
+        "dioscouri/f3-admin": ">=v0.8"
     },
     "autoload": {
         "psr-0": {
diff --git a/src/Blog/Admin/Views/categories/checkboxes.php b/src/Blog/Admin/Views/categories/checkboxes.php
index 53fb58e..713325e 100644
--- a/src/Blog/Admin/Views/categories/checkboxes.php
+++ b/src/Blog/Admin/Views/categories/checkboxes.php
@@ -1,7 +1,7 @@
 <?php if (!empty($categories)) { ?>
 <div class="max-height-200 list-group-item">
     
-    <?php $current = \Joomla\Utilities\ArrayHelper::getColumn( (array) $flash->old('categories'), 'id' ); ?>
+    <?php $current = \DscArrayHelper::getColumn( (array) $flash->old('categories'), 'id' ); ?>
     <?php foreach ($categories as $one) { ?>
     <div class="checkbox">
         <label>
diff --git a/src/Blog/Admin/Views/posts/list.php b/src/Blog/Admin/Views/posts/list.php
index 2c4b546..70d3aba 100644
--- a/src/Blog/Admin/Views/posts/list.php
+++ b/src/Blog/Admin/Views/posts/list.php
@@ -157,7 +157,7 @@
 		                        				<label>Author:</label> <a href="./admin/user/edit/<?php echo $item->{'author.id'}?>" title="<?php echo $item->{'author.name'}; ?>"><?php echo $item->{'author.name'}; ?></a>
 		                        			</div>
 		                        			<div>
-			                        			<?php $categories = \Joomla\Utilities\ArrayHelper::getColumn( (array) $item->categories, 'title' ); ?>
+			                        			<?php $categories = \DscArrayHelper::getColumn( (array) $item->categories, 'title' ); ?>
 		                        				<label>Categories:</label>
 												<span class='label label-warning'><?php echo implode("</span> <span class='label label-warning'>", (array) $categories ); ?></span>
 		                        			</div>
diff --git a/src/Blog/Models/Posts.php b/src/Blog/Models/Posts.php
index df6499c..2d67e1d 100644
--- a/src/Blog/Models/Posts.php
+++ b/src/Blog/Models/Posts.php
@@ -189,7 +189,7 @@ public function getRelatedPosts($limit = 12)
         $categories = array();
         if (!empty($this->{'categories'}))
         {
-            $categories = \Joomla\Utilities\ArrayHelper::getColumn((array) $this->{'categories'}, 'id');
+            $categories = \DscArrayHelper::getColumn((array) $this->{'categories'}, 'id');
         }
         
         if (!empty($categories)) 
diff --git a/src/Blog/Modules/Categories/Views/default.php b/src/Blog/Modules/Categories/Views/default.php
index baf566f..2a9cbf4 100644
--- a/src/Blog/Modules/Categories/Views/default.php
+++ b/src/Blog/Modules/Categories/Views/default.php
@@ -31,7 +31,7 @@
 
 			<?php			
 			} else {
-				$selected_categories = \Joomla\Utilities\ArrayHelper::getColumn( $selected_categories, 'id' );
+				$selected_categories = \DscArrayHelper::getColumn( $selected_categories, 'id' );
 				
 				$keys = array_keys( $tree->nodes );
 				$c_n = count( $tree->nodes );