diff --git a/index.js b/index.js
index a92a592a..942be381 100644
--- a/index.js
+++ b/index.js
@@ -46,9 +46,9 @@ function parserForArrayFormat(opts) {
 	switch (opts.arrayFormat) {
 		case 'index':
 			return function (key, value, accumulator) {
-				result = /\[(\d*)]$/.exec(key);
+				result = /\[(\d*)\]$/.exec(key);
 
-				key = key.replace(/\[\d*]$/, '');
+				key = key.replace(/\[\d*\]$/, '');
 
 				if (!result) {
 					accumulator[key] = value;
@@ -64,9 +64,9 @@ function parserForArrayFormat(opts) {
 
 		case 'bracket':
 			return function (key, value, accumulator) {
-				result = /(\[])$/.exec(key);
+				result = /(\[\])$/.exec(key);
 
-				key = key.replace(/\[]$/, '');
+				key = key.replace(/\[\]$/, '');
 
 				if (!result || accumulator[key] === undefined) {
 					accumulator[key] = value;