diff --git a/src/main/java/co/omise/models/Source.java b/src/main/java/co/omise/models/Source.java
index d0fde4ca..dbf71a56 100644
--- a/src/main/java/co/omise/models/Source.java
+++ b/src/main/java/co/omise/models/Source.java
@@ -292,6 +292,7 @@ public CreateRequestBuilder email(String email) {
             this.email = email;
             return this;
         }
+
         public CreateRequestBuilder ip(String ip) {
             this.ip = ip;
             return this;