diff --git a/settings.gradle b/settings.gradle
index db0e282b..f353fcc6 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -11,7 +11,7 @@ include ':vtm-gdx'
 include ':vtm-desktop'
 include ':vtm-android-gdx'
 include ':vtm-web'
-//include ':vtm-web-app'
+include ':vtm-web-app'
 //include ':vtm-web-js'
 include ':vtm-jeo'
 include ':vtm-playground'
diff --git a/vtm-web-app/build.gradle b/vtm-web-app/build.gradle
index c1f0fbf8..deb41bea 100644
--- a/vtm-web-app/build.gradle
+++ b/vtm-web-app/build.gradle
@@ -35,6 +35,9 @@ gwt {
     gwtVersion = project.ext.gwtVersion
     modules 'org.oscim.web.VtmWebApp'
 
+    minHeapSize = "512M"
+    maxHeapSize = "2048M"
+
     superDev {
         noPrecompile = true
     }
diff --git a/vtm-web/src/org/oscim/gdx/emu/javax/annotation/CheckReturnValue.java b/vtm-web/src/org/oscim/gdx/emu/javax/annotation/CheckReturnValue.java
new file mode 100644
index 00000000..f9d02319
--- /dev/null
+++ b/vtm-web/src/org/oscim/gdx/emu/javax/annotation/CheckReturnValue.java
@@ -0,0 +1,8 @@
+package javax.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+
+@Target( { ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE, ElementType.PACKAGE })
+public @interface CheckReturnValue {
+}