diff --git a/src/BeSimple/SoapServer/SoapServerBuilder.php b/src/BeSimple/SoapServer/SoapServerBuilder.php
index b67812b..61b51cf 100644
--- a/src/BeSimple/SoapServer/SoapServerBuilder.php
+++ b/src/BeSimple/SoapServer/SoapServerBuilder.php
@@ -161,21 +161,21 @@ class SoapServerBuilder
     
     public function withWsdlDiskCache()
     { 
-        $this->options['cache_wsdl'] = WSDL_CACHE_DISK;
+        $this->options['cache_wsdl'] = Cache::TYPE_DISK;
         
         return $this; 
     }
     
     public function withWsdlMemoryCache()
     { 
-        $this->options['cache_wsdl'] = WSDL_CACHE_MEMORY;
+        $this->options['cache_wsdl'] = Cache::TYPE_MEMORY;
         
         return $this;
     }
     
     public function withWsdlDiskAndMemoryCache()
     { 
-        $this->options['cache_wsdl'] = WSDL_CACHE_BOTH;
+        $this->options['cache_wsdl'] = Cache::TYPE_DISK_MEMORY;
         
         return $this;
     }