diff --git a/index.d.ts b/index.d.ts
index 28b78ae..762aae0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -26,7 +26,7 @@ pupa('I like {{0}} and {{1}}', ['<br>🦄</br>', '<i>🐮</i>']);
 */
 declare function pupa(
 	template: string,
-	data: unknown[] | {[key: string]: unknown}
+	data: unknown[] | {[key: string]: any}
 ): string;
 
 export = pupa;
diff --git a/index.js b/index.js
index 4555579..c8dc040 100644
--- a/index.js
+++ b/index.js
@@ -20,7 +20,7 @@ module.exports = (template, data) => {
 				result = result ? result[property] : '';
 			}
 
-			return htmlEscape(result.toString()) || '';
+			return htmlEscape(String(result));
 		});
 	}
 
@@ -33,6 +33,6 @@ module.exports = (template, data) => {
 			result = result ? result[property] : '';
 		}
 
-		return result || '';
+		return String(result);
 	});
 };
diff --git a/test.js b/test.js
index 3babccd..a8a1a13 100644
--- a/test.js
+++ b/test.js
@@ -5,6 +5,7 @@ test('main', t => {
 	// Normal placeholder
 	t.is(pupa('{foo}', {foo: '!'}), '!');
 	t.is(pupa('{foo}', {foo: 10}), '10');
+	t.is(pupa('{foo}', {foo: 0}), '0');
 	t.is(pupa('{foo}{foo}', {foo: '!'}), '!!');
 	t.is(pupa('{foo}{bar}{foo}', {foo: '!', bar: '#'}), '!#!');
 	t.is(pupa('yo {foo} lol {bar} sup', {foo: '🦄', bar: '🌈'}), 'yo 🦄 lol 🌈 sup');
@@ -23,6 +24,7 @@ test('main', t => {
 	// Encoding HTML Entities to avoid code injection
 	t.is(pupa('{{foo}}', {foo: '!'}), '!');
 	t.is(pupa('{{foo}}', {foo: 10}), '10');
+	t.is(pupa('{{foo}}', {foo: 0}), '0');
 	t.is(pupa('{{foo}}{{foo}}', {foo: '!'}), '!!');
 	t.is(pupa('{foo}{{bar}}{foo}', {foo: '!', bar: '#'}), '!#!');
 	t.is(pupa('yo {{foo}} lol {{bar}} sup', {foo: '🦄', bar: '🌈'}), 'yo 🦄 lol 🌈 sup');