diff --git a/models/resources/workflow/graph/graph.go b/models/resources/workflow/graph/graph.go
index ce868e8..a2a2758 100644
--- a/models/resources/workflow/graph/graph.go
+++ b/models/resources/workflow/graph/graph.go
@@ -35,7 +35,7 @@ type GraphLinkStyle struct {
 }
 
 type Position struct {
-	ID string  `json:"ID" validate:"required"`
-	X  float64 `json:"x" validate:"required"`
-	Y  float64 `json:"y" validate:"required"`
+	ID string  `json:"id" bson:"id" validate:"required"`
+	X  float64 `json:"x" bson:"x" validate:"required"`
+	Y  float64 `json:"y" bson:"y" validate:"required"`
 }