diff --git a/cli.js b/cli.js
index c216295..b41a9a6 100755
--- a/cli.js
+++ b/cli.js
@@ -44,7 +44,7 @@ if (argv.l) {
 } else if (argv._.length) {
 	say();
 } else {
-	require("get-stdin")(function (data) {
+	require("get-stdin")().then(function (data) {
 		if (data) {
 			argv._ = [data];
 			say();
diff --git a/lib/balloon.js b/lib/balloon.js
index e79de05..8f80a92 100644
--- a/lib/balloon.js
+++ b/lib/balloon.js
@@ -1,3 +1,5 @@
+var stringWidth = require("string-width");
+
 exports.say = function (text, wrap) {
 	var delimiters = {
 		first : ["/", "\\"],
@@ -83,8 +85,8 @@ function split (text, wrap) {
 function max (lines) {
 	var max = 0;
 	for (var i = 0, len = lines.length; i < len; i += 1) {
-		if (lines[i].length > max) {
-			max = lines[i].length;
+		if (stringWidth(lines[i]) > max) {
+			max = stringWidth(lines[i]);
 		}
 	}
 
@@ -92,7 +94,7 @@ function max (lines) {
 }
 
 function pad (text, length) {
-	return text + (new Array(length - text.length + 1)).join(" ");
+	return text + (new Array(length - stringWidth(text) + 1)).join(" ");
 }
 
 function top (length) {
diff --git a/package.json b/package.json
index adc85d3..e0782a1 100644
--- a/package.json
+++ b/package.json
@@ -40,13 +40,14 @@
     "test": "node test.js"
   },
   "dependencies": {
-    "get-stdin": "^4.0.1",
-    "optimist": "~0.6.1"
+    "get-stdin": "^5.0.1",
+    "optimist": "~0.6.1",
+    "string-width": "~2.1.1"
   },
   "devDependencies": {
     "nodeunit": "~0.11.1",
-    "rollup": "^0.47.4",
-    "rollup-plugin-commonjs": "^8.1.0",
+    "rollup": "^0.48.2",
+    "rollup-plugin-commonjs": "^8.2.0",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-string": "^2.0.2"
   },
diff --git a/rollup.config.js b/rollup.config.js
index d87094c..53a4190 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -3,7 +3,7 @@ import nodeResolve from 'rollup-plugin-node-resolve';
 import string from 'rollup-plugin-string';
 
 export default {
-  entry: 'browser.js',
+  input: 'browser.js',
   plugins: [
     nodeResolve({
       module: true,
@@ -14,9 +14,9 @@ export default {
       include: '**/*.cow',
     }),
   ],
-  moduleName: 'cowsay',
-  targets: [
-    { dest: 'build/cowsay.umd.js', format: 'umd' },
-    { dest: 'build/cowsay.es.js', format: 'es' },
+  name: 'cowsay',
+  output: [
+    { file: 'build/cowsay.umd.js', format: 'umd' },
+    { file: 'build/cowsay.es.js', format: 'es' },
   ]
 }