diff --git a/package-lock.json b/package-lock.json
index fc88818..3a49e12 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "sorted-btree",
-  "version": "1.6.0",
+  "version": "1.6.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "sorted-btree",
-      "version": "1.6.0",
+      "version": "1.6.1",
       "license": "MIT",
       "devDependencies": {
         "@types/bintrees": "^1.0.2",
@@ -7879,9 +7879,9 @@
       }
     },
     "node_modules/ws": {
-      "version": "7.3.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.1.tgz",
-      "integrity": "sha512-D3RuNkynyHmEJIpD2qrgVkc9DQ23OrN/moAwZX4L8DfvszsJxpjQuUq3LMx6HoYji9fbIOBY18XWBsAux1ZZUA==",
+      "version": "7.5.7",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.7.tgz",
+      "integrity": "sha512-KMvVuFzpKBuiIXW3E4u3mySRO2/mCHSyZDJQM5NQ9Q9KHWHWh0NHgfbRMLLrceUK5qAL4ytALJbpRMjixFZh8A==",
       "dev": true,
       "engines": {
         "node": ">=8.3.0"
@@ -14198,9 +14198,9 @@
       }
     },
     "ws": {
-      "version": "7.3.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.1.tgz",
-      "integrity": "sha512-D3RuNkynyHmEJIpD2qrgVkc9DQ23OrN/moAwZX4L8DfvszsJxpjQuUq3LMx6HoYji9fbIOBY18XWBsAux1ZZUA==",
+      "version": "7.5.7",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.7.tgz",
+      "integrity": "sha512-KMvVuFzpKBuiIXW3E4u3mySRO2/mCHSyZDJQM5NQ9Q9KHWHWh0NHgfbRMLLrceUK5qAL4ytALJbpRMjixFZh8A==",
       "dev": true,
       "requires": {}
     },