diff --git a/src/datepickerPopup/popup.js b/src/datepickerPopup/popup.js
index 02c0e88a1c..6b28e35de8 100644
--- a/src/datepickerPopup/popup.js
+++ b/src/datepickerPopup/popup.js
@@ -72,6 +72,13 @@ function($scope, $element, $attrs, $compile, $log, $parse, $window, $document, $
           }
         }
       });
+      $attrs.$observe('altInputFormats', function(value, oldValue) {
+        var newAltInputFormats = angular.isDefined(value) ? $scope.$parent.$eval(value) : altInputFormats;
+
+        if (newAltInputFormats !== altInputFormats) {
+          altInputFormats = newAltInputFormats;
+        }
+      });
     }
 
     if (!dateFormat) {
diff --git a/src/datepickerPopup/test/popup.spec.js b/src/datepickerPopup/test/popup.spec.js
index 227fdb3596..501f396553 100644
--- a/src/datepickerPopup/test/popup.spec.js
+++ b/src/datepickerPopup/test/popup.spec.js
@@ -1514,7 +1514,8 @@ describe('datepicker popup', function() {
     describe('attribute `alt-input-formats`', function() {
       beforeEach(function() {
         $rootScope.date = new Date('November 9, 1980');
-        var wrapElement = $compile('<div><input ng-model="date" uib-datepicker-popup="MMMM d yyyy" alt-input-formats="[\'M!/d!/yyyy\']" is-open="true"></div>')($rootScope);
+        $rootScope.altInputFormats = ['M!/d!/yyyy'];
+        var wrapElement = $compile('<div><input ng-model="date" uib-datepicker-popup="MMMM d yyyy" alt-input-formats="altInputFormats" is-open="true"></div>')($rootScope);
         $rootScope.$digest();
         assignElements(wrapElement);
       });
@@ -1532,6 +1533,17 @@ describe('datepicker popup', function() {
         changeInputValueTo(inputEl, '11/8/1980');
         expect(selectedElementIndex()).toEqual(13);
       });
+
+      it('changes alternate input formats', function() {
+        $rootScope.altInputFormats = ['yyyy-M!-d!'];
+        $timeout(function() {
+          changeInputValueTo(inputEl, '2017-08-30');
+
+          expect($rootScope.date.getFullYear()).toEqual(2017);
+          expect($rootScope.date.getMonth()).toEqual(7);
+          expect($rootScope.date.getDate()).toEqual(30);
+        }, 0);
+      });
     });
   });