diff --git a/es5.js b/es5.js
index 033c9d4..7faf8b7 100644
--- a/es5.js
+++ b/es5.js
@@ -4,6 +4,7 @@ function EventPubSub() {
     this._events_={};
     this.publish=this.trigger=this.emit=emit;
     this.subscribe=this.on=on;
+    this.once=once;
     this.unSubscribe=this.off=off;
     this.emit$=emit$;
 
diff --git a/examples/node/basic-es5.js b/examples/node/basic-es5.js
index 167af85..131f7e2 100644
--- a/examples/node/basic-es5.js
+++ b/examples/node/basic-es5.js
@@ -1,5 +1,9 @@
-const Events = require('../../es5.js');
-const events = new Events;
+'use strict';
+// requireing 'event-pubsub' module will auto detect ES6/ES5 support
+// so we will force it here incase you support ES6
+// for example sake
+var ForceES5 = require('../../es5.js');
+var events = new ForceES5;
 
 events.on(
     'hello',
diff --git a/examples/node/basic.js b/examples/node/basic.js
index 98fa05e..1a2f82a 100644
--- a/examples/node/basic.js
+++ b/examples/node/basic.js
@@ -1,4 +1,5 @@
-const Events = new require('../../event-pubsub.js');
+'use strict';
+const Events = require('../../event-pubsub.js');
 
 const events=new Events;
 
diff --git a/examples/node/extending-es5.js b/examples/node/extending-es5.js
index 032ed46..e602cb8 100644
--- a/examples/node/extending-es5.js
+++ b/examples/node/extending-es5.js
@@ -1,4 +1,8 @@
-const Events = require('../../es5.js');
+'use strict';
+// requireing 'event-pubsub' module will auto detect ES6/ES5 support
+// so we will force it here incase you support ES6
+// for example sake
+var Events = require('../../es5.js');
 
 function Book(){
     //extend happens below
@@ -24,7 +28,7 @@ function Book(){
     }
 
     function erase(count){
-        const words=this.words.splice(
+        var words=this.words.splice(
             -count
         );
         this.trigger(
@@ -43,7 +47,7 @@ function Book(){
     return this;
 };
 
-const book=new Book;
+var book=new Book;
 
 book.on(
     'added',
diff --git a/examples/node/extending.js b/examples/node/extending.js
index 3b8a436..2b23a69 100644
--- a/examples/node/extending.js
+++ b/examples/node/extending.js
@@ -1,3 +1,4 @@
+'use strict';
 const Events = require('../../event-pubsub.js');
 
 class Book extends Events{
diff --git a/examples/node/multiple.js b/examples/node/multiple.js
index ca123c4..8c798bc 100644
--- a/examples/node/multiple.js
+++ b/examples/node/multiple.js
@@ -1,3 +1,4 @@
+'use strict';
 const Events = require('../../event-pubsub.js');
 
 /************************************\
diff --git a/examples/node/once-es5.js b/examples/node/once-es5.js
new file mode 100644
index 0000000..b6aacef
--- /dev/null
+++ b/examples/node/once-es5.js
@@ -0,0 +1,42 @@
+'use strict';
+// requireing 'event-pubsub' module will auto detect ES6/ES5 support
+// so we will force it here incase you support ES6
+// for example sake
+var Events = require('../../es5.js');
+
+var events=new Events;
+
+
+/**********************************\
+ *
+ * Demonstrate once
+ *
+ * ********************************/
+events.once(
+   'test.once',
+   (data)=>{
+     console.log(`got data ${data} from .once`)
+   }
+);
+
+events.on(
+   'test.once',
+   (data)=>{
+     console.log(`got data ${data} from .on with true`)
+   },
+   true
+);
+
+/************************************\
+ * emit events for testing
+ * **********************************/
+
+events.emit(
+    'test.once',
+    '-5 TESTING-'
+);
+
+events.emit(
+    'test.once',
+    '-5 NEVER SEE THIS-'
+);
diff --git a/examples/node/once.js b/examples/node/once.js
index 4a60b96..1a82d6a 100644
--- a/examples/node/once.js
+++ b/examples/node/once.js
@@ -1,4 +1,5 @@
-const Events = new require('../../event-pubsub.js');
+'use strict';
+const Events = require('../../event-pubsub.js');
 
 const events=new Events;
 
@@ -7,20 +8,20 @@ const events=new Events;
  * Demonstrate once
  *
  * ********************************/
- events.once(
-     'test.once',
-     (data)=>{
-       console.log(`got data ${data} from .once`)
-     }
- );
+events.once(
+   'test.once',
+   (data)=>{
+     console.log(`got data ${data} from .once`)
+   }
+);
 
- events.on(
-     'test.once',
-     (data)=>{
-       console.log(`got data ${data} from .on with true`)
-     },
-     true
- );
+events.on(
+   'test.once',
+   (data)=>{
+     console.log(`got data ${data} from .on with true`)
+   },
+   true
+);
 
 /************************************\
  * emit events for testing