diff --git a/src/Ip.php b/src/Ip.php
index <HASH>..<HASH> 100644
--- a/src/Ip.php
+++ b/src/Ip.php
@@ -4,7 +4,7 @@ namespace G4\ValueObject;
 
 use G4\ValueObject\Exception\InvalidIpException;
 
-class Ip
+class Ip implements StringInterface
 {
 
     /**
Added StringInterface to Ip