diff --git a/jquery/jquery-1.8.d.ts b/jquery/jquery-1.9.d.ts
similarity index 95%
rename from jquery/jquery-1.8.d.ts
rename to jquery/jquery-1.9.d.ts
index 4e617c961..2bdd9f689 100644
--- a/jquery/jquery-1.8.d.ts
+++ b/jquery/jquery-1.9.d.ts
@@ -13,7 +13,7 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-// Typing for the jQuery library, version 1.7.x
+// Typing for the jQuery library, version 1.9.x
 
 /*
     Interface for the AJAX setting that will configure the AJAX request
@@ -378,8 +378,11 @@ interface JQuery {
     /***
      CSS
     ****/
-    css(propertyName: string, value?: any): any;
-    css(propertyName: any, value?: any): any;
+    css(propertyName: string): any;
+    css(propertyNames: string[]): any;
+    css(properties: any): any;
+    css(propertyName: string, value: any): any;    
+    css(propertyName: any, value: any): any;
 
     height(): number;
     height(value: number): JQuery;
diff --git a/jquery/jquery-tests.ts b/jquery/jquery-tests.ts
index 998997b2c..d45a6ee02 100644
--- a/jquery/jquery-tests.ts
+++ b/jquery/jquery-tests.ts
@@ -1,4 +1,4 @@
-/// <reference path="jquery-1.8.d.ts" />
+/// <reference path="jquery-1.9.d.ts" />
 
 function test_add() {
     $("p").add("div").addClass("widget");
@@ -829,9 +829,9 @@ function test_css() {
             height: function (index, value) {
                 return parseFloat(value) * 1.2;
             }
-
         });
     });
+    var dims = $("#box").css([ "width", "height", "backgroundColor" ]);
 }
 
 function test_cssHooks() {