diff --git a/src/Dom/Selector/XPathSelector.php b/src/Dom/Selector/XPathSelector.php
index 5d984def..71981ee2 100644
--- a/src/Dom/Selector/XPathSelector.php
+++ b/src/Dom/Selector/XPathSelector.php
@@ -19,18 +19,11 @@ public function __construct(string $expression)
 
     public function expressionCount(): string
     {
-        return \sprintf(
-            'document.evaluate("%s", document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null).snapshotLength',
-            \addslashes($this->expression)
-        );
+        return 'document.evaluate('.\json_encode($this->expression, \JSON_THROW_ON_ERROR | \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE).', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null).snapshotLength';
     }
 
     public function expressionFindOne(int $position): string
     {
-        return \sprintf(
-            'document.evaluate("%s[%d]", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue',
-            \addslashes($this->expression),
-            $position
-        );
+        return 'document.evaluate('.\json_encode($this->expression."[{$position}]", \JSON_THROW_ON_ERROR | \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE).', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue';
     }
 }