diff --git a/src/Captcha.php b/src/Captcha.php
index 8a0ce49..e3fa5ef 100644
--- a/src/Captcha.php
+++ b/src/Captcha.php
@@ -224,7 +224,7 @@ public function create(string $config = null, bool $api = false): Response
             $y     = $this->fontSize + mt_rand(10, 20);
             $angle = $this->math ? 0 : mt_rand(-40, 40);
 
-            imagettftext($this->im, $this->fontSize, $angle, $x, $y, $this->color, $fontttf, $char);
+            imagettftext($this->im, $this->fontSize, $angle, (int) $x, (int) $y, $this->color, $fontttf, $char);
         }
 
         ob_start();