diff --git a/Dockerfile b/Dockerfile
index a3ec879..179804e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # Dockerfile for Domoticz-Google-Assistant
 
 # Install minimal Python 3.
-FROM jfloff/alpine-python:3.7-slim
+FROM python:3-alpine
 
 RUN mkdir -p config
 
@@ -9,11 +9,12 @@ COPY *.py /
 COPY templates/ /templates/
 COPY static/ /static/
 COPY requirements/pip-requirements.txt /requirements.txt
+RUN pip install --no-cache-dir -r /requirements.txt
 
 # Create volume
 VOLUME /config
 
 # Configure Services and Port
-CMD ["python3 /__main__.py"]
+CMD ["python3", "/__main__.py"]
 
 EXPOSE 3030
diff --git a/const.py b/const.py
index 9e418de..4d1bbbd 100644
--- a/const.py
+++ b/const.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
                     
 """Constants for Google Assistant."""
-VERSION = '1.23.6'
+VERSION = '1.23.7'
 PUBLIC_URL = 'https://[your public url]'
 CONFIGFILE = 'config/config.yaml'
 LOGFILE = 'dzga.log'
diff --git a/smarthome.py b/smarthome.py
index 28bbd75..71f3322 100644
--- a/smarthome.py
+++ b/smarthome.py
@@ -759,7 +759,7 @@ def syncDevices_post(self, s):
             raise SmartHomeError(ERR_PROTOCOL_ERROR, 'not authorized access!!')
 
         r = self.forceDevicesSync()
-        s.send_message(200, 'Synchronization request sent, status_code: ' + st(r))
+        s.send_message(200, 'Synchronization request sent, status_code: ' + str(r))
         
     def notification_post(self, s):
         logger.debug(s.headers)
@@ -851,7 +851,8 @@ def forceDevicesSync(self):
         userAgent = self.getUserAgent()
         enableReport = ReportState.enable_report_state()
         if userAgent is None:
-            return 500  # internal error
+            # return 500  # internal error
+            userAgent = "1234"
 
         data = {"agentUserId": userAgent}
         if enableReport: