diff --git a/Generator/CaptchaGenerator.php b/Generator/CaptchaGenerator.php
index 08cde2d..a588a54 100644
--- a/Generator/CaptchaGenerator.php
+++ b/Generator/CaptchaGenerator.php
@@ -98,17 +98,18 @@ class CaptchaGenerator
         $this->builder->setMaxFrontLines($options['max_front_lines']);
         $this->builder->setMaxBehindLines($options['max_behind_lines']);
 
-        if ($options['text_color'] != array()) {
-            if (count($options['text_color'])!=3) {
-                throw new \RuntimeException('text_color should be an array of r, g and b');
+
+        if (isset($options['text_color'])) {
+            if (count($options['text_color']) !== 3) {
+		throw new \RuntimeException('text_color should be an array of r, g and b');
             }
 
             $color = $options['text_color'];
             $this->builder->setTextColor($color[0], $color[1], $color[2]);
         }
 
-        if ($options['background_color'] != array()) {
-            if (count($options['background_color'])!=3) {
+        if (isset($options['background_color'])) {
+            if (count($options['background_color']) !== 3) {
                 throw new \RuntimeException('background_color should be an array of r, g and b');
             }