diff --git a/src/main/java/com/eclipsesource/v8/utils/V8ObjectUtils.java b/src/main/java/com/eclipsesource/v8/utils/V8ObjectUtils.java
index 7129782d8..7e83ad80d 100644
--- a/src/main/java/com/eclipsesource/v8/utils/V8ObjectUtils.java
+++ b/src/main/java/com/eclipsesource/v8/utils/V8ObjectUtils.java
@@ -369,7 +369,7 @@ private static Object getV8Result(final V8 v8, final Object value, final Map<Obj
     @SuppressWarnings({ "unchecked", "rawtypes" })
     private static void pushValue(final V8 v8, final V8Array result, final Object value, final Map<Object, V8Object> cache) {
         if (value == null) {
-            result.pushUndefined();
+            result.pushNull();
         } else if (value instanceof Integer) {
             result.push((Integer) value);
         } else if (value instanceof Long) {
@@ -396,7 +396,7 @@ private static void pushValue(final V8 v8, final V8Array result, final Object va
     @SuppressWarnings({ "unchecked", "rawtypes" })
     private static void setValue(final V8 v8, final V8Object result, final String key, final Object value, final Map<Object, V8Object> cache) {
         if (value == null) {
-            result.addUndefined(key);
+            result.addNull(key);
         } else if (value instanceof Integer) {
             result.add(key, (Integer) value);
         } else if (value instanceof Long) {