diff --git a/Dockerfile b/Dockerfile
index 5409e2e..f652600 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,8 +12,6 @@ ENV SOCKS_PORT 9050
 
 ENV CONTROL_PORT 9077
 
-ENV INSTANCES 3
-
 ENV PATH $PATH:/app/bin
 
 ADD http://public.zacharyboyd.nyc/columbia-ubuntu-sources.list /etc/apt/sources.list
diff --git a/src/ControlServer.js b/src/ControlServer.js
index acb884c..123a6c3 100644
--- a/src/ControlServer.js
+++ b/src/ControlServer.js
@@ -22,7 +22,9 @@ class ControlServer {
 		socket.on('createSOCKSServer', this.createSOCKSServer.bind(this));
 		socket.on('createDNSServer', this.createDNSServer.bind(this));
 
-		socket.on('createInstances', (instances, callback) => { this.torPool.create(instances, callback); });
+		socket.on('createInstances', (instances, callback) => { this.torPool.create(instances, (error, instances) => {
+			callback(error)
+		}); });
 		socket.on('newIps', () => { this.torPool.new_ips(); });
 		socket.on('nextInstance', () => { this.torPool.next(); });
 		socket.on('closeInstances', () => { this.torPool.exit(); });