diff --git a/plugin.syntaxhighlighter.php b/plugin.syntaxhighlighter.php
index 0d693a3..9ec6ed5 100644
--- a/plugin.syntaxhighlighter.php
+++ b/plugin.syntaxhighlighter.php
@@ -28,7 +28,6 @@ SOFTWARE.
 
 */
 
-$config = include('config.php');
 
 function plugin_syntaxhighlighter_add($lang=null) {
 	static $languages = array();
@@ -46,6 +45,8 @@ function plugin_syntaxhighlighter_add($lang=null) {
 
 
 function plugin_syntaxhighlighter_head() {
+
+	$config = include('config.php');
 	$pdir=plugin_geturl('syntaxhighlighter');
 echo <<<PRISMJS
 	<!-- start of prism.js header -->
@@ -62,6 +63,7 @@ add_action('wp_head', 'plugin_syntaxhighlighter_head');
 
 function plugin_syntaxhighlighter_foot() {
 
+  $config = include('config.php');
   // convert the returned array into a json one, to have an easier time
   // giving it to the javascript below
   $used_languages = json_encode(plugin_syntaxhighlighter_add());
@@ -71,7 +73,7 @@ function plugin_syntaxhighlighter_foot() {
   echo <<<PRISMBOX
     <!-- start of prism.js footer -->
     
-    <script type="text/javascript" src="{$pdir}res/prism.$config['size'].js"></script>
+    <script type="text/javascript" src="{$pdir}res/prism.{$config['size']}.js"></script>
     
     <!-- include wrapping-function to wrap content of pre html-tags into code-tags, as said in https://prismjs.com/index.html#basic-usage -->
     <script type="text/javascript" src="{$pdir}res/syntaxhighlighter-ng.js"></script>