diff --git a/packages/core/src/types/edge.ts b/packages/core/src/types/edge.ts
index 5d0feeee..256dd861 100644
--- a/packages/core/src/types/edge.ts
+++ b/packages/core/src/types/edge.ts
@@ -103,6 +103,7 @@ export interface DefaultEdge<Data = ElementData, CustomEvents extends Record<str
   /** contextual and custom events of edge */
   events?: Partial<EdgeEventsHandler<CustomEvents>>
   /** Aria label for edge (a11y) */
+  zIndex?: number
   ariaLabel?: string | null
 }
 
@@ -148,7 +149,6 @@ export interface EdgePositions {
 /** Internal edge type */
 export type GraphEdge<Data = ElementData, CustomEvents extends Record<string, CustomEvent> = any> = Edge<Data, CustomEvents> & {
   selected?: boolean
-  z?: number
   sourceNode: GraphNode
   targetNode: GraphNode
   data: Data
diff --git a/packages/core/src/types/node.ts b/packages/core/src/types/node.ts
index 75717ae0..b10ba327 100644
--- a/packages/core/src/types/node.ts
+++ b/packages/core/src/types/node.ts
@@ -85,6 +85,7 @@ export interface Node<Data = ElementData, CustomEvents extends Record<string, Cu
   /** contextual and custom events that are passed to your custom components */
   events?: Partial<NodeEventsHandler<CustomEvents>>
 
+  zIndex?: number
   ariaLabel?: string
 }