diff --git a/src/ProxyClient/Varnish.php b/src/ProxyClient/Varnish.php
index a4b7137e..ab542059 100644
--- a/src/ProxyClient/Varnish.php
+++ b/src/ProxyClient/Varnish.php
@@ -110,7 +110,7 @@ public function banPath(string $path, ?string $contentType = null, array|string|
             if (!count($hosts)) {
                 throw new InvalidArgumentException('Either supply a list of hosts or null, but not an empty array.');
             }
-            $hosts = '^('.implode('|', $hosts).')$';
+            $hosts = '^('.implode('|', array_map('preg_quote', $hosts)).')$';
         }
 
         $headers = [