diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..11f974d
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,7 @@
+module github.com/paked/messenger
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.2.2
+)
diff --git a/response.go b/response.go
index 4411761..20e243c 100644
--- a/response.go
+++ b/response.go
@@ -87,6 +87,11 @@ type Response struct {
 	to    Recipient
 }
 
+// SetToken is for using DispatchMessage from outside.
+func (r *Response) SetToken(token string) {
+	r.token = token
+}
+
 // Text sends a textual message.
 func (r *Response) Text(message string, messagingType MessagingType, tags ...string) error {
 	return r.TextWithReplies(message, nil, messagingType, tags...)
@@ -368,7 +373,7 @@ type StructuredMessagePayload struct {
 type StructuredMessageElement struct {
 	Title         string                    `json:"title"`
 	ImageURL      string                    `json:"image_url"`
-	ItemURL       string                    `json:"item_url"`
+	ItemURL       string                    `json:"item_url,omitempty"`
 	Subtitle      string                    `json:"subtitle"`
 	DefaultAction *DefaultAction            `json:"default_action,omitempty"`
 	Buttons       []StructuredMessageButton `json:"buttons"`