diff --git a/docs/tutorial.md b/docs/tutorial.md
index 0ffc1bb..d9b5d6d 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -105,6 +105,7 @@ The possible values for the `webservice` parameter are:
 
 * `Webservice.APICEP`
 * `Webservice.VIACEP`
+* `Webservice.OPENCEP`
 
 ## Errors and Exceptions