diff --git a/pushtx/index-orchestrator.js b/pushtx/index-orchestrator.js
index 0151b09..c1c1dbc 100644
--- a/pushtx/index-orchestrator.js
+++ b/pushtx/index-orchestrator.js
@@ -39,7 +39,7 @@
 
   // Initialize notification sockets of singleton pushTxProcessor
   pushTxProcessor.initNotifications({
-    uriSocket: `tcp://*:${keys.ports.orchestrator}`
+    uriSocket: `tcp://127.0.0.1:${keys.ports.orchestrator}`
   })
 
   // Initialize and start the orchestrator
diff --git a/pushtx/index.js b/pushtx/index.js
index 729830b..0d0b1ca 100644
--- a/pushtx/index.js
+++ b/pushtx/index.js
@@ -40,7 +40,7 @@
 
   // Initialize notification sockets of singleton pushTxProcessor
   pushTxProcessor.initNotifications({
-    uriSocket: `tcp://*:${keys.ports.notifpushtx}`
+    uriSocket: `tcp://127.0.0.1:${keys.ports.notifpushtx}`
   })
 
   // Initialize the http server
diff --git a/tracker/tracker.js b/tracker/tracker.js
index 8ebaf99..1089faa 100644
--- a/tracker/tracker.js
+++ b/tracker/tracker.js
@@ -22,7 +22,7 @@ class Tracker {
   constructor() {
     // Notification socket for client events
     this.notifSock = zmq.socket('pub')
-    this.notifSock.bindSync(`tcp://*:${keys.ports.tracker}`)
+    this.notifSock.bindSync(`tcp://127.0.0.1:${keys.ports.tracker}`)
 
     // Initialize the blockchain processor
     // and the mempool buffer