diff --git a/native1/event_tracking_method.go b/native1/event_tracking_method.go
index 07d82f3..fab4f1b 100644
--- a/native1/event_tracking_method.go
+++ b/native1/event_tracking_method.go
@@ -1,7 +1,7 @@
 package native1
 
 // 7.7 Event Tracking Methods Table
-type EventTrackingMethod int8
+type EventTrackingMethod int64
 
 const (
 	EventTrackingMethodImage EventTrackingMethod = 1 // Image-pixel tracking - URL provided will be inserted as a 1x1 pixel at the time of the event.
diff --git a/native1/event_type.go b/native1/event_type.go
index abd05a9..4fabfa0 100644
--- a/native1/event_type.go
+++ b/native1/event_type.go
@@ -1,7 +1,7 @@
 package native1
 
 // 7.6 Event Types Table
-type EventType int8
+type EventType int64
 
 const (
 	EventTypeImpression      EventType = 1 // Impression