diff --git a/build.gradle b/build.gradle
index 3d25985..8f50cd1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ plugins {
 }
 
 group 'io.github.chronosx88'
-version '0.2.3'
+version '0.2.4'
 
 sourceCompatibility = 1.8
 
diff --git a/src/main/java/io/github/chronosx88/JGUN/PathRef.java b/src/main/java/io/github/chronosx88/JGUN/PathRef.java
index da64844..1a0b75e 100644
--- a/src/main/java/io/github/chronosx88/JGUN/PathRef.java
+++ b/src/main/java/io/github/chronosx88/JGUN/PathRef.java
@@ -97,10 +97,10 @@ public class PathRef {
     }
 
     public void on(NodeChangeListener changeListener) {
-        dispatcher.addChangeListener(String.join("/", path), changeListener);
+        dispatcher.addChangeListener(Utils.join("/", path), changeListener);
     }
 
     public void map(NodeChangeListener.ForEach forEachListener) {
-        dispatcher.addForEachChangeListener(String.join("/", path), forEachListener);
+        dispatcher.addForEachChangeListener(Utils.join("/", path), forEachListener);
     }
 }
diff --git a/src/main/java/io/github/chronosx88/JGUN/Utils.java b/src/main/java/io/github/chronosx88/JGUN/Utils.java
index 823ef78..ceabdae 100644
--- a/src/main/java/io/github/chronosx88/JGUN/Utils.java
+++ b/src/main/java/io/github/chronosx88/JGUN/Utils.java
@@ -5,6 +5,7 @@ import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
 import org.json.JSONObject;
 
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.concurrent.ConcurrentSkipListSet;
 
 public class Utils {
@@ -76,7 +77,7 @@ public class Utils {
             if(value instanceof JSONObject) {
                 path.add(key);
                 String soul = "";
-                soul = String.join("/", path);
+                soul = Utils.join("/", path);
                 Node tmpNode = Utils.newNode(soul, (JSONObject) value);
                 node.values.remove(key);
                 node.values.put(key, new JSONObject().put("#", soul));
@@ -119,4 +120,27 @@ public class Utils {
             for(node)
         }
     }*/
+
+    /**
+     * Returns a string containing the tokens joined by delimiters.
+     *
+     * @param delimiter a CharSequence that will be inserted between the tokens. If null, the string
+     *     "null" will be used as the delimiter.
+     * @param tokens an array objects to be joined. Strings will be formed from the objects by
+     *     calling object.toString(). If tokens is null, a NullPointerException will be thrown. If
+     *     tokens is empty, an empty string will be returned.
+     */
+    public static String join(CharSequence delimiter, Iterable tokens) {
+        final Iterator<?> it = tokens.iterator();
+        if (!it.hasNext()) {
+            return "";
+        }
+        final StringBuilder sb = new StringBuilder();
+        sb.append(it.next());
+        while (it.hasNext()) {
+            sb.append(delimiter);
+            sb.append(it.next());
+        }
+        return sb.toString();
+    }
 }