diff --git a/CHANGELOG.md b/CHANGELOG.md
index e04684b..d10bd99 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+<a name="1.0.4"></a>
+## [v1.0.4](https://github.com/changLiuUNSW/angular-numeric-input/compare/1.0.3...1.0.4) (2020-12-10)
+
+### Added
+
+- can setting decimal precision (html tag attr: decimal-precision)
+- modify regexp controller decimal precision number to limited (to limit the decimal-precision number)
+
 <a name="1.0.4"></a>
 ## [v1.0.4](https://github.com/changLiuUNSW/angular-numeric-input/compare/1.0.3...1.0.4) (2017-05-28)
 
diff --git a/dist/angular-numeric-input.js b/dist/angular-numeric-input.js
index 8684a16..3ff7315 100644
--- a/dist/angular-numeric-input.js
+++ b/dist/angular-numeric-input.js
@@ -25,8 +25,18 @@
 
                     if (attrs.allowDecimal) {
                         positiveInteger = false;
-                        precision = 2;
+                        /*
+                          2020-12-10 Rong add can setting decimal precision
+                          and
+                          modify regexp controller decimal limit
+                        */
+                        if(attrs.decimalPrecision){
+                          precision = attrs.decimalPrecision;
+                        }else{
+                          precision = 2;
+                        }
                         min = 0;
+                        NUMBER_REGEXP = new RegExp("^\\s*[-+]?(\\d+|\\d*\\.\\d{0," + precision + "})\\s*$")
                     }
 
                     if (attrs.minNotEqual) {
@@ -105,6 +115,7 @@
                         return value;
                     }
 
+                    var copyValue
                     ngModelCtrl.$parsers.push(function(input) {
                         //check undefined and NaN
                         //http://adripofjavascript.com/blog/drips/the-problem-with-testing-for-nan-in-javascript.html
@@ -193,4 +204,4 @@
                 }
             };
         }]);
-})();
\ No newline at end of file
+})();