diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 642d319b..e18b9201 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -34,6 +34,7 @@ export {
   getNodesInside,
   getMarkerId,
   getBoundsofRects,
+  connectionExists,
 } from './utils/graph'
 
 /**