diff --git a/Zutil.jar b/Zutil.jar
index 94905a2..1f7356d 100644
Binary files a/Zutil.jar and b/Zutil.jar differ
diff --git a/src/zutil/parser/json/JSONWriter.java b/src/zutil/parser/json/JSONWriter.java
index 4af8550..31ffff8 100644
--- a/src/zutil/parser/json/JSONWriter.java
+++ b/src/zutil/parser/json/JSONWriter.java
@@ -127,7 +127,7 @@ public class JSONWriter{
     /**
      * @return JSON String that is generated from the input DataNode graph
      */
-    public String toString(DataNode root){
+    public static String toString(DataNode root){
         StringOutputStream out = new StringOutputStream();
         JSONWriter writer = new JSONWriter(out);
         writer.write(root);