diff --git a/opensrs/Ops.php b/opensrs/Ops.php
index 56598afc..22df1b96 100644
--- a/opensrs/Ops.php
+++ b/opensrs/Ops.php
@@ -33,7 +33,7 @@ public function __construct($args = false)
             }
         }
 
-        $this->_SESSID = uniqid();
+        $this->_SESSID = microtime(true);
         $this->_MSGCNT = 0;
     }