diff --git a/README.md b/README.md
index ee01707..68617f7 100644
--- a/README.md
+++ b/README.md
@@ -47,14 +47,20 @@ Returns an `Array` without `value` if `arr` is includes this `value`
 *Required*<br>
 Type: `Array`
 
+Array with values needs to toggle
+
 #### value
 *Required*<br>
 Type: `Array`
 
+Value to toggle in `arr`
+
 #### predicate
 Type: `Function`<br>
 Default: `(a, b) => a === b` *Strict equality comparison*
 
+Function that compare each `arr` item to equal `value`
+
 ## License
 MIT © [Vladimir Rodkin](https://github.com/VovanR)
 
diff --git a/index.js b/index.js
index e058927..09c97fa 100644
--- a/index.js
+++ b/index.js
@@ -1,10 +1,10 @@
 /**
  * Add or remove item from array
  *
- * @param {Array} arr
- * @param {*} value
- * @param {Function} [predicate]
- * @return {Array}
+ * @param {Array} arr Array with values needs to toggle
+ * @param {*} value Value to toggle in `arr`
+ * @param {Function} [predicate] Function that compare each `arr` item to equal `value`. Strict equality comparison by default
+ * @return {Array} New array with or without `value`
  *
  * @example
  * toggleInArray([1, 2, 3], 2)
@@ -48,9 +48,9 @@ function toggleInArray(arr, value, predicate) {
 /**
  * Strict equality comparison
  *
- * @param {*} a
- * @param {*} b
- * @return {boolean}
+ * @param {*} a Item of array
+ * @param {*} b Value to toggle
+ * @return {boolean} `true` if `a` and `b` are strict equals
  */
 function defaultPredicate(a, b) {
 	return a === b;
diff --git a/package.json b/package.json
index 1c25d5b..4db2d38 100644
--- a/package.json
+++ b/package.json
@@ -27,14 +27,14 @@
   ],
   "dependencies": {},
   "devDependencies": {
-    "ava": "^0.24.0",
-    "conventional-changelog-cli": "^1.3.5",
-    "coveralls": "^3.0.0",
+    "ava": "^0.25.0",
+    "conventional-changelog-cli": "^2.0.0",
+    "coveralls": "^3.0.1",
     "cz-conventional-changelog": "^2.1.0",
     "husky": "^0.14.3",
     "mversion": "^1.10.1",
-    "nyc": "^11.4.1",
-    "xo": "^0.18.2"
+    "nyc": "^12.0.2",
+    "xo": "^0.21.1"
   },
   "bugs": {
     "url": "https://github.com/VovanR/toggle-in-array/issues"
diff --git a/test.js b/test.js
index 8de5231..7afe21c 100644
--- a/test.js
+++ b/test.js
@@ -1,5 +1,5 @@
 import test from 'ava';
-import fn from './';
+import fn from '.';
 
 test('is function', t => {
 	t.is(typeof fn, 'function');