diff --git a/pubsubjs/PubSub-tests.ts b/pubsubjs/PubSub-tests.ts
index 6f0163e97..0a452d08e 100644
--- a/pubsubjs/PubSub-tests.ts
+++ b/pubsubjs/PubSub-tests.ts
@@ -68,4 +68,16 @@ function test_Hierarchical_addressing() {
     // topics, three times in total
     // But, mySpecificSubscriber will only be called once, as it only
     // subscribes to the 'car.drive' topic
+}
+
+function ClearAllSubscriptions() {
+    // create a function to receive messages
+    var mySubscriber = (msg: string, data: any) => { console.log(msg, data); }
+
+    // create two subscriptions
+    PubSub.subscribe('topic1', mySubscriber);
+    PubSub.subscribe('topic2', mySubscriber);
+
+    // unsubscribe from all subscrpitions
+    PubSub.clearAllSubscriptions();
 }
\ No newline at end of file
diff --git a/pubsubjs/pubsub.d.ts b/pubsubjs/pubsub.d.ts
index e24c901a4..d8e6e077d 100644
--- a/pubsubjs/pubsub.d.ts
+++ b/pubsubjs/pubsub.d.ts
@@ -1,10 +1,10 @@
-// Type definitions for PubSubJS 1.3.5
+// Type definitions for PubSubJS 1.5.2
 // Project: https://github.com/mroderick/PubSubJS
 // Definitions by: Boris Yankov <https://github.com/borisyankov/>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 declare module PubSubJS {
-    interface Base extends Publish, Subscribe, Unsubscribe {
+    interface Base extends Publish, Subscribe, Unsubscribe, ClearAllSubscriptions {
         version: string;
         name: string;
     }
@@ -25,6 +25,15 @@ declare module PubSubJS {
     interface Unsubscribe{
         unsubscribe(tokenOrFunction: any): any;
     }
+
+
+    interface ClearAllSubscriptions{
+        clearAllSubscriptions(): any;
+    }
 }
 
 declare var PubSub: PubSubJS.Base;
+
+declare module "pubsub-js" {
+  export = PubSub;
+}