diff --git a/models/resources/workflow/graph/graph.go b/models/resources/workflow/graph/graph.go
index 5ddaa08..74b426d 100644
--- a/models/resources/workflow/graph/graph.go
+++ b/models/resources/workflow/graph/graph.go
@@ -6,7 +6,7 @@ type Graph struct {
 }
 
 type GraphItem struct {
-	ID         string   `bson:"ID" json:"ID" validate:"required"`
+	ID         string   `bson:"id" json:"id" validate:"required"`
 	Width      float64  `bson:"width" json:"width" validate:"required"`
 	Height     float64  `bson:"height" json:"height" validate:"required"`
 	Position   Position `bson:"position" json:"position" validate:"required"`