diff --git a/package.json b/package.json
index 0abd07a..b5b5d30 100644
--- a/package.json
+++ b/package.json
@@ -68,8 +68,7 @@
   "dependencies": {
     "@types/jest-image-snapshot": "^6.1.0",
     "chalk": "^4.1.2",
-    "jest-image-snapshot": "^6.1.0",
-    "just-extend": "^6.2.0"
+    "jest-image-snapshot": "^6.1.0"
   },
   "volta": {
     "node": "18.16.0",
diff --git a/src/command.ts b/src/command.ts
index c80865f..3500f8c 100644
--- a/src/command.ts
+++ b/src/command.ts
@@ -1,4 +1,4 @@
-import extend from 'just-extend'
+import extend from './util/extend'
 import {MATCH, RECORD, RM} from './constants'
 import type {
   CypressImageSnapshotOptions,
diff --git a/src/util/extend.d.ts b/src/util/extend.d.ts
new file mode 100644
index 0000000..54287ba
--- /dev/null
+++ b/src/util/extend.d.ts
@@ -0,0 +1,3 @@
+declare function extend(obj1: object, ...objn: any[]): object
+declare function extend(deep: boolean, obj1: object, ...objn: any[]): object
+export default extend
diff --git a/src/util/extend.js b/src/util/extend.js
new file mode 100644
index 0000000..04ca777
--- /dev/null
+++ b/src/util/extend.js
@@ -0,0 +1,77 @@
+/* eslint-disable no-var, prefer-rest-params */
+// https://github.com/angus-c/just/blob/master/packages/object-extend/index.mjs
+var objectExtend = extend
+
+/*
+  var obj = {a: 3, b: 5};
+  extend(obj, {a: 4, c: 8}); // {a: 4, b: 5, c: 8}
+  obj; // {a: 4, b: 5, c: 8}
+
+  var obj = {a: 3, b: 5};
+  extend({}, obj, {a: 4, c: 8}); // {a: 4, b: 5, c: 8}
+  obj; // {a: 3, b: 5}
+
+  var arr = [1, 2, 3];
+  var obj = {a: 3, b: 5};
+  extend(obj, {c: arr}); // {a: 3, b: 5, c: [1, 2, 3]}
+  arr.push(4);
+  obj; // {a: 3, b: 5, c: [1, 2, 3, 4]}
+
+  var arr = [1, 2, 3];
+  var obj = {a: 3, b: 5};
+  extend(true, obj, {c: arr}); // {a: 3, b: 5, c: [1, 2, 3]}
+  arr.push(4);
+  obj; // {a: 3, b: 5, c: [1, 2, 3]}
+
+  extend({a: 4, b: 5}); // {a: 4, b: 5}
+  extend({a: 4, b: 5}, 3); {a: 4, b: 5}
+  extend({a: 4, b: 5}, true); {a: 4, b: 5}
+  extend('hello', {a: 4, b: 5}); // throws
+  extend(3, {a: 4, b: 5}); // throws
+*/
+
+function extend(/* [deep], obj1, obj2, [objn] */) {
+  var args = [].slice.call(arguments)
+  var deep = false
+  if (typeof args[0] == 'boolean') {
+    deep = args.shift()
+  }
+  var result = args[0]
+  if (isUnextendable(result)) {
+    throw new Error('extendee must be an object')
+  }
+  var extenders = args.slice(1)
+  var len = extenders.length
+  for (var i = 0; i < len; i++) {
+    var extender = extenders[i]
+    for (var key in extender) {
+      if (Object.prototype.hasOwnProperty.call(extender, key)) {
+        var value = extender[key]
+        if (deep && isCloneable(value)) {
+          var base = Array.isArray(value) ? [] : {}
+          result[key] = extend(
+            true,
+            Object.prototype.hasOwnProperty.call(result, key) &&
+              !isUnextendable(result[key])
+              ? result[key]
+              : base,
+            value,
+          )
+        } else {
+          result[key] = value
+        }
+      }
+    }
+  }
+  return result
+}
+
+function isCloneable(obj) {
+  return Array.isArray(obj) || {}.toString.call(obj) == '[object Object]'
+}
+
+function isUnextendable(val) {
+  return !val || (typeof val != 'object' && typeof val != 'function')
+}
+
+export {objectExtend as default}
diff --git a/tsconfig.json b/tsconfig.json
index b1c8697..e2c2190 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,6 +6,7 @@
     "module": "commonjs",
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
+    "allowJs": true,
     "strict": true,
     "skipLibCheck": true,
     "declaration": true,
diff --git a/yarn.lock b/yarn.lock
index 0400476..86b5edf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1014,7 +1014,6 @@ __metadata:
     eslint-plugin-prettier: ^4.2.1
     http-server: ^14.1.1
     jest-image-snapshot: ^6.1.0
-    just-extend: ^6.2.0
     npm-run-all: ^4.1.5
     prettier: ^2.8.8
     replace-json-property: ^1.9.0
@@ -4975,13 +4974,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"just-extend@npm:^6.2.0":
-  version: 6.2.0
-  resolution: "just-extend@npm:6.2.0"
-  checksum: 022024d6f687c807963b97a24728a378799f7e4af7357d1c1f90dedb402943d5c12be99a5136654bed8362c37a358b1793feaad3366896f239a44e17c5032d86
-  languageName: node
-  linkType: hard
-
 "kind-of@npm:^6.0.3":
   version: 6.0.3
   resolution: "kind-of@npm:6.0.3"