diff --git a/src/ZombieDriver.php b/src/ZombieDriver.php
index 4fe7440..0b7af40 100644
--- a/src/ZombieDriver.php
+++ b/src/ZombieDriver.php
@@ -115,6 +115,11 @@ public function visit($url)
         // Cleanup cached references
         $this->nativeRefs = array();
 
+        // Urlencode non-ascii characters
+        $url = preg_replace_callback('/[^\x20-\x7f]/', function($match) {
+            return urlencode($match[0]);
+        }, $url);
+
         $js = <<<JS
 pointers = [];
 browser.visit("{$url}", function (err) {