diff --git a/dependencies/ruby/Gemfile b/dependencies/ruby/Gemfile
index a47fdac96e2..5bb99730e75 100644
--- a/dependencies/ruby/Gemfile
+++ b/dependencies/ruby/Gemfile
@@ -6,4 +6,4 @@ gem 'rdoc', '= 4.0.0'
 gem 'test-unit', '= 2.0.0.0'
 
 # OpenStudio
-gem 'openstudio-aws', '~> 0.4.0.alpha2'
+gem 'openstudio-aws', '~> 0.4.0.pre1'
diff --git a/dependencies/ruby/Gemfile.lock b/dependencies/ruby/Gemfile.lock
index ecda58e6253..8e332792672 100644
--- a/dependencies/ruby/Gemfile.lock
+++ b/dependencies/ruby/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
     net-ssh (2.9.2)
-    openstudio-aws (0.4.0.alpha2)
+    openstudio-aws (0.4.0.pre1)
       aws-sdk-core (~> 2.0)
       net-scp (~> 1.1)
       semantic (~> 1.4)
@@ -29,7 +29,7 @@ PLATFORMS
   x86-mingw32
 
 DEPENDENCIES
-  openstudio-aws (~> 0.4.0.alpha2)
+  openstudio-aws (~> 0.4.0.pre1)
   rake (= 0.9.6)
   rdoc (= 4.0.0)
   test-unit (= 2.0.0.0)
diff --git a/openstudiocore/ruby/cloud/aws.rb.in b/openstudiocore/ruby/cloud/aws.rb.in
index 8dcc779616c..67435fd3a33 100644
--- a/openstudiocore/ruby/cloud/aws.rb.in
+++ b/openstudiocore/ruby/cloud/aws.rb.in
@@ -201,13 +201,8 @@ begin
           image_id: @server_image_id
       }
 
-      # Create the server & worker
+      # Create the server
       @aws.create_server server_options
-      worker_options = {
-          instance_type: @params['worker_instance_type'],
-          image_id: @worker_image_id
-      }
-      @aws.create_workers @params['num'], worker_options
 
       @aws.save_cluster_info 'state.json'
 
@@ -218,7 +213,6 @@ begin
       unless @params.key? 'num'
         error(-1, 'Number of worker nodes not specified. Must be greater than or equal to 0')
       end
-=begin
       worker_options = {
           instance_type: @params['instance_type'],
           image_id: @worker_image_id
@@ -233,9 +227,7 @@ begin
       @aws.save_cluster_info 'state.json'
 
       puts @aws.cluster_info.to_json
-=end
-      puts JSON.parse(File.read('state.json')).to_json
-      #@logger.info("launch_workers: #{@aws.cluster_info}")
+      @logger.info("launch_workers: #{@aws.cluster_info}")
     when 'terminate_session'
       @aws.load_instance_info_from_file 'state.json'
       @aws.terminate
diff --git a/openstudiocore/src/pat_app/CloudMonitor.cpp b/openstudiocore/src/pat_app/CloudMonitor.cpp
index 91328ea645a..04514b93a56 100644
--- a/openstudiocore/src/pat_app/CloudMonitor.cpp
+++ b/openstudiocore/src/pat_app/CloudMonitor.cpp
@@ -723,7 +723,7 @@ void StartCloudWorker::startWorking()
 
     if( provider->requestStartServer() )
     {
-      m_error = ! provider->waitForServer(900000);
+      m_error = ! provider->waitForServer();
     }
   }
 
diff --git a/openstudiocore/src/utilities/cloud/AWSProvider.cpp b/openstudiocore/src/utilities/cloud/AWSProvider.cpp
index 7de294ce22c..c5028038c27 100644
--- a/openstudiocore/src/utilities/cloud/AWSProvider.cpp
+++ b/openstudiocore/src/utilities/cloud/AWSProvider.cpp
@@ -1523,8 +1523,6 @@ namespace openstudio{
 
       QJsonObject options;
       options["instance_type"] = QJsonValue(toQString(m_awsSettings.serverInstanceType()));
-      options["worker_instance_type"] = QJsonValue(toQString(m_awsSettings.workerInstanceType()));
-      options["num"] = QJsonValue(static_cast<int>(m_awsSettings.numWorkers()));
       options["openstudio_version"] = QJsonValue(toQString(openStudioVersion()));
       args << QString(QJsonDocument(options).toJson(QJsonDocument::Compact));
 
@@ -2079,6 +2077,7 @@ namespace openstudio{
       auto jsonObject = json.object(); 
       auto serverObject = jsonObject["server"].toObject();
       serverObject["private_key_file_name"] = m_workingDir.path() + "/ec2_server_key.pem";
+      serverObject["worker_private_key_file_name"] = m_workingDir.path() + "/ec2_worker_key.pem";
       jsonObject["server"] = serverObject;
       auto workers = jsonObject["workers"].toArray();
       for (auto i = 0; i < workers.size(); ++i) {