diff --git a/package-lock.json b/package-lock.json
index 62b8d45..07b005b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "cytoscape-expand-collapse",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index cc003a1..c0dbc3d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cytoscape-expand-collapse",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "This extension provides an interface to expand-collapse nodes.",
   "main": "cytoscape-expand-collapse.js",
   "spm": {