diff --git a/package-lock.json b/package-lock.json
index 3ffa3ac..79fa158 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "subscript",
-  "version": "8.3.7",
+  "version": "8.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "subscript",
-      "version": "8.3.7",
+      "version": "8.4.0",
       "license": "ISC",
       "devDependencies": {
         "rollup": "^2.60.2",
diff --git a/package.json b/package.json
index d3bfbcf..db8fa1c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "subscript",
-  "version": "8.3.7",
+  "version": "8.4.0",
   "description": "Fast and tiny expression evaluator with minimal syntax.",
   "main": "subscript.js",
   "module": "subscript.js",