diff --git a/index.js b/index.js
index 598fc9a..c2feb41 100644
--- a/index.js
+++ b/index.js
@@ -48,9 +48,9 @@ function copy_object (obj) {
 /**
  * run a regular expression and callback for every result
  *
- * @param regex regular expression
- * @param data data to run on
- * @param func function to execute
+ * @param {any} regex regular expression
+ * @param {any} data data to run on
+ * @param {any} func function to execute
  */
 function run_regex (regex, data, func) {
   let res = regex.exec (data);
@@ -61,7 +61,6 @@ function run_regex (regex, data, func) {
 }
 
 
-
 module.exports = {
   truncate_decimal,
   try_parse_json,