diff --git a/.travis.yml b/.travis.yml
index 2ae9d62..f3fa8cd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,4 +2,3 @@ language: node_js
 node_js:
   - '10'
   - '8'
-  - '6'
diff --git a/index.d.ts b/index.d.ts
index 2500c20..77e0fa3 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,4 +1,12 @@
 /**
 Get the visual width of the widest line in a string - the number of columns required to display it.
+
+@example
+```
+import widestLine from 'widest-line';
+
+widestLine('古\n\u001B[1m@\u001B[22m');
+//=> 2
+```
 */
 export default function widestLine(input: string): number;
diff --git a/package.json b/package.json
index ff99ba2..edd1f2d 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=6"
+		"node": ">=8"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd-check"
@@ -22,7 +22,6 @@
 	"keywords": [
 		"string",
 		"character",
-		"char",
 		"unicode",
 		"width",
 		"visual",
@@ -45,7 +44,7 @@
 		"fixed-width"
 	],
 	"dependencies": {
-		"string-width": "^3.1.0"
+		"string-width": "^4.0.0"
 	},
 	"devDependencies": {
 		"ava": "^1.3.1",