diff --git a/application/libraries/wordphp.php b/application/libraries/wordphp.php
index a240782c..ac3778cc 100644
--- a/application/libraries/wordphp.php
+++ b/application/libraries/wordphp.php
@@ -147,7 +147,7 @@ class WordPHP
 		$node = trim($xml->readOuterXML());
 		$t = '';
 		// add <br> tags
-		if (strstr($node,'<w:br ')) $t = '<br>';					 
+		if (mb_strstr($node,'<w:br ')) $t = '<br>';					 
 		// look for formatting tags
 		$f = "<span style='";
 		$reader = new XMLReader();
@@ -284,7 +284,7 @@ class WordPHP
 	{
 		$arr = explode('.', $name);
 		$l = count($arr);
-		$ext = strtolower($arr[$l-1]);
+		$ext = mb_strtolower($arr[$l-1]);
 
 		$im = imagecreatefromstring($image);
 		if (empty($this->img_dir)) {