ensure that maxLen is passed down, to handle zero-padding

index.js

@@ -60,7 +60,7 @@ const toMaxLen = (input, maxLength) => {
   return negative ? ('-' + input) : input;
 };
 
-const toSequence = (parts, options) => {
+const toSequence = (parts, options, maxLen) => {
   parts.negatives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
   parts.positives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
 
@@ -70,11 +70,11 @@ const toSequence = (parts, options) => {
   let result;
 
   if (parts.positives.length) {
-    positives = parts.positives.join('|');
+    positives = parts.positives.map(v => toMaxLen(String(v), maxLen)).join('|');
   }
 
   if (parts.negatives.length) {
-    negatives = `-(${prefix}${parts.negatives.join('|')})`;
+    negatives = `-(${prefix}${parts.negatives.map(v => toMaxLen(String(v), maxLen)).join('|')})`;
   }
 
   if (positives && negatives) {
@@ -172,7 +172,7 @@ const fillNumbers = (start, end, step = 1, options = {}) => {
 
   if (options.toRegex === true) {
     return step > 1
-      ? toSequence(parts, options)
+      ? toSequence(parts, options, maxLen)
       : toRegex(range, null, { wrap: false, ...options });
   }
 
@@ -184,7 +184,6 @@ const fillLetters = (start, end, step = 1, options = {}) => {
     return invalidRange(start, end, options);
   }
 
-
   let format = options.transform || (val => String.fromCharCode(val));
   let a = `${start}`.charCodeAt(0);
   let b = `${end}`.charCodeAt(0);