diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeApi.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeApi.java
index 10dac18c9e..bcd755f7b3 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeApi.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeApi.java
@@ -25,7 +25,7 @@ import com.google.gwtjsonrpc.common.AsyncCallback;
 public class ChangeApi {
   private static final String URI = "/changes/";
 
-  private static class Message extends JavaScriptObject {
+  protected static class Message extends JavaScriptObject {
     public final native void setMessage(String value) /*-{ this.message = value; }-*/;
   }
 
@@ -36,7 +36,7 @@ public class ChangeApi {
    */
   public static void abandon(int changeId, String message,
       AsyncCallback<ChangeInfo> callback) {
-    Message msg = new Message();
+    Message msg = (Message) JavaScriptObject.createObject();
     msg.setMessage(message);
     new RestApi(URI + changeId + "/abandon").data(msg).post(callback);
   }
diff --git a/gerrit-plugin-gwtui/pom.xml b/gerrit-plugin-gwtui/pom.xml
index f5df326732..1460870557 100644
--- a/gerrit-plugin-gwtui/pom.xml
+++ b/gerrit-plugin-gwtui/pom.xml
@@ -58,7 +58,7 @@ limitations under the License.
                    <pluginExecutionFilter>
                      <groupId>org.codehaus.mojo</groupId>
                      <artifactId>gwt-maven-plugin</artifactId>
-                     <versionRange>[2.4.0,)</versionRange>
+                     <versionRange>[2.5.0,)</versionRange>
                      <goals>
                        <goal>resources</goal>
                        <goal>compile</goal>
@@ -121,4 +121,5 @@ limitations under the License.
       </plugin>
     </plugins>
   </build>
-</project>
\ No newline at end of file
+</project>
+
diff --git a/pom.xml b/pom.xml
index e482a2d720..1af26700b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@ limitations under the License.
     <gwtormVersion>1.5</gwtormVersion>
     <gwtjsonrpcVersion>1.3</gwtjsonrpcVersion>
     <gwtexpuiVersion>1.2.6</gwtexpuiVersion>
-    <gwtVersion>2.4.0</gwtVersion>
+    <gwtVersion>2.5.0</gwtVersion>
     <bouncyCastleVersion>140</bouncyCastleVersion>
     <slf4jVersion>1.6.1</slf4jVersion>
     <guiceVersion>3.0</guiceVersion>
@@ -385,7 +385,7 @@ limitations under the License.
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>gwt-maven-plugin</artifactId>
-          <version>2.4.0</version>
+          <version>2.5.0</version>
         </plugin>
 
         <plugin>