diff --git a/api/members/members_models/event.go b/api/members/members_models/event.go
index 78b47dc..4ddaa8e 100644
--- a/api/members/members_models/event.go
+++ b/api/members/members_models/event.go
@@ -43,6 +43,9 @@ type Event struct {
 	// event category
 	EventCategory *EventCategory `json:"EventCategory,omitempty"`
 
+	// event category ID
+	EventCategoryID *string `json:"EventCategoryID,omitempty"`
+
 	// ID
 	ID string `json:"ID,omitempty"`
 
diff --git a/api/sfgate/sfgate_models/event.go b/api/sfgate/sfgate_models/event.go
index 77df047..b4bcb2d 100644
--- a/api/sfgate/sfgate_models/event.go
+++ b/api/sfgate/sfgate_models/event.go
@@ -43,6 +43,9 @@ type Event struct {
 	// event category
 	EventCategory *EventCategory `json:"EventCategory,omitempty"`
 
+	// event category ID
+	EventCategoryID *string `json:"EventCategoryID,omitempty"`
+
 	// ID
 	ID string `json:"ID,omitempty"`
 
diff --git a/swagger/defs/event.yaml b/swagger/defs/event.yaml
index eed6217..d995c4b 100644
--- a/swagger/defs/event.yaml
+++ b/swagger/defs/event.yaml
@@ -16,6 +16,9 @@ Event:
       x-nullable: true
     EventCategory:
       $ref: "./event-category.yaml#/EventCategory"
+    EventCategoryID:
+      type: string
+      x-nullable: true
     Description:
       type: string
       x-nullable: true