diff --git a/index.js b/index.js
index 83242d7..7ce8dc2 100644
--- a/index.js
+++ b/index.js
@@ -14,6 +14,7 @@ class S3Notifier {
     this.ui = options.ui;
     this.bucket = options.bucket;
     this.key = options.key;
+    this.notifiers = [];
     this.pollTime = options.poll || DEFAULT_POLL_TIME;
 
     this.params = {
@@ -23,7 +24,7 @@ class S3Notifier {
   }
 
   subscribe(notify) {
-    this.notify = notify;
+    this.notifiers.push(notify);
 
     return this.getCurrentLastModified()
       .then(() => this.schedulePoll());
@@ -54,10 +55,10 @@ class S3Notifier {
   }
 
   compareLastModifieds(newLastModified) {
-    if (newLastModified !== this.lastModified) {
+    if ((newLastModified + '') !== (this.lastModified + '')) {
       this.ui.writeLine('config modified; old=%s; new=%s', this.lastModified, newLastModified);
       this.lastModified = newLastModified;
-      this.notify();
+      this.notifiers.forEach(notifier => notifier(newLastModified));
     }
   }
 }
diff --git a/package.json b/package.json
index b269da1..ae58cd7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fastboot-s3-notifier",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "A FastBoot App Server notifier for AWS S3",
   "main": "index.js",
   "scripts": {