diff --git a/src/Shoplo/Resource.php b/src/Shoplo/Resource.php
index 44fd31c..ae16f31 100755
--- a/src/Shoplo/Resource.php
+++ b/src/Shoplo/Resource.php
@@ -17,7 +17,7 @@ protected function prepare_params($params)
 	{
 		$string = '';
 		if (is_array($params)) {
-			foreach ($params as $k => $v) if (!is_array($v)) $string .= $k . '=' . urlencode($v) . '&';
+			foreach ($params as $k => $v) if (!is_array($v)) $string .= $k . '=' . rawurlencode($v) . '&';
 			$string = substr($string, 0, strlen($string) - 1);
 		}
 		return $string;
@@ -75,4 +75,4 @@ public function __destruct()
 		unset($this->client);
 		unset($this->bucket);
 	}
-}
\ No newline at end of file
+}