diff --git a/packages/core/src/types/edge.ts b/packages/core/src/types/edge.ts
index e989f006..42b05bb5 100644
--- a/packages/core/src/types/edge.ts
+++ b/packages/core/src/types/edge.ts
@@ -1,7 +1,7 @@
 import type { CSSProperties, Component, VNode } from 'vue'
 import type { ClassFunc, ElementData, Position, StyleFunc, Styles } from './flow'
 import type { GraphNode } from './node'
-import type { DefaultEdgeTypes, EdgeComponent, EdgeTextProps } from './components'
+import type { EdgeComponent, EdgeTextProps } from './components'
 import type { CustomEvent, EdgeEventsHandler, EdgeEventsOn } from './hooks'
 
 /** Edge markers */
@@ -58,14 +58,17 @@ export interface EdgeLabelOptions {
   labelBgBorderRadius?: number
 }
 
-export interface DefaultEdge<Data = ElementData, CustomEvents extends Record<string, CustomEvent> = any>
-  extends EdgeLabelOptions {
+export interface DefaultEdge<
+  Data = ElementData,
+  CustomEvents extends Record<string, CustomEvent> = any,
+  Type extends string = string,
+> extends EdgeLabelOptions {
   /** Unique edge id */
   id: string
   /** An edge label */
   label?: string | VNode | Component<EdgeTextProps>
   /** Edge type, can be a default type or a custom type */
-  type?: keyof DefaultEdgeTypes | string
+  type?: Type
   /** Source node id */
   source: string
   /** Target node id */
@@ -132,8 +135,8 @@ export type BezierEdgeType<Data = ElementData, CustomEvents extends Record<strin
   pathOptions?: BezierPathOptions
 }
 
-export type Edge<Data = ElementData, CustomEvents extends Record<string, CustomEvent> = any> =
-  | DefaultEdge<Data, CustomEvents>
+export type Edge<Data = ElementData, CustomEvents extends Record<string, CustomEvent> = any, Type extends string = string> =
+  | DefaultEdge<Data, CustomEvents, Type>
   | SmoothStepEdgeType<Data, CustomEvents>
   | BezierEdgeType<Data, CustomEvents>
 
@@ -217,3 +220,9 @@ export type SmoothStepEdgeProps = EdgePositions &
   Omit<BaseEdgeProps, 'labelX' | 'labelY' | 'path'> &
   Pick<EdgeProps, 'sourcePosition' | 'targetPosition'> &
   SmoothStepPathOptions
+
+export type ToGraphEdge<T extends Edge> = GraphEdge<
+  T extends Edge<infer Data> ? Data : never,
+  T extends Edge<never, infer CustomEvents> ? CustomEvents : never,
+  T extends Edge<never, never, infer Type> ? Type : never
+>