diff --git a/README.md b/README.md
index b121047542072fc0a52746e69a33072996e58e22..471cf0d5bdd1e5e2baee87f26534d0a9d8282efd 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # WZL-MQTT
 [![pipeline status](https://git-ce.rwth-aachen.de/wzl-mq-ms/forschung-lehre/digital-mars/mqtt/badges/master/pipeline.svg)](https://git-ce.rwth-aachen.de/wzl-mq-ms/forschung-lehre/digital-mars/mqtt/badges/master)
 
-Current stable version: 2.4.1
+Current stable version: 2.4.2
 
 ## Installation
 Requires at least Python 3.6
@@ -79,6 +79,9 @@ To obtain credentials for MQTT-Broker of WZL-MQ-MS contact [Mark Sanders](mailto
 For more detailed explanation and full API documentation, view [https://iot.wzl-mq.rwth-aachen.de/documentation/libs/mqtt/](https://iot.wzl-mq.rwth-aachen.de/documentation/libs/mqtt/)
 
 ## Changelog
+2.4.2
+- fixed a bug of websocket connection
+
 2.4.1
 - made the error message of code 1 more precise
 
diff --git a/private_testing/publish.py b/private_testing/publish.py
deleted file mode 100644
index 7842d210a4f3506b36f150e4e3648414c5302301..0000000000000000000000000000000000000000
--- a/private_testing/publish.py
+++ /dev/null
@@ -1,39 +0,0 @@
-import datetime
-import json
-import random
-import time
-import uuid
-
-from src.mqtt import Logger
-from src import mqtt
-
-### Ask for settings and individual credentials ###
-
-MQTT_USER = "bdn-212d8419-c75c-471f-8ea5-f3a5c19ac42e"
-MQTT_PASSWORD = "azesR4Q8~M7UBKh<7S~d\"NN-|)i9:Le["
-
-MQTT_BROKER = "mqtt.wzl-mq.rwth-aachen.de"
-MQTT_PORT = 8883
-MQTT_VHOST = "metrology"
-
-### to connect to the central MQTT-Broker of MQ-MS use the following settings:
-# MQTT_BROKER = "wzl-mbroker01.wzl.rwth-aachen.de"
-# MQTT_PORT = 1883
-# MQTT_VHOST = "metrology"
-
-### Ask for settings and individual credentials ###
-
-
-if __name__ == "__main__":
-
-    client = mqtt.MQTTPublisher(prefix="bdn-212d8419-c75c-471f-8ea5-f3a5c19ac42e")
-    client.connect(MQTT_BROKER, MQTT_PORT, MQTT_USER, MQTT_PASSWORD, vhost=MQTT_VHOST, ssl=True)
-
-    while True:
-        try:
-            message = json.dumps({"value": [random.uniform(0, 5) for i in range(3)], "timestamp": datetime.datetime.utcnow().isoformat() + "Z",
-                                  "covariance": [[2, 0, 0], [0, 2, 0], [0, 0, 0]], "nonce": str(uuid.uuid4()), "hash": None, "unit": "MTR"})
-            client.publish("channel-001", message.encode("utf-8"), 2)
-            time.sleep(1)
-        except KeyboardInterrupt:
-            break
diff --git a/private_testing/receive.py b/private_testing/receive.py
deleted file mode 100644
index d08d8ae8dfaf0eda23ee7044f886b3bd2ca55015..0000000000000000000000000000000000000000
--- a/private_testing/receive.py
+++ /dev/null
@@ -1,42 +0,0 @@
-import time
-
-from src.mqtt import Logger
-from src import mqtt
-
-### Ask for settings and individual credentials ###
-
-MQTT_USER = "bdn-212d8419-c75c-471f-8ea5-f3a5c19ac42e"
-MQTT_PASSWORD = "azesR4Q8~M7UBKh<7S~d\"NN-|)i9:Le["
-
-MQTT_BROKER = "mqtt.wzl-mq.rwth-aachen.de"
-MQTT_PORT = 8883
-MQTT_VHOST = "metrology"
-
-## to connect to the central MQTT-Broker of MQ-MS use the following settings:
-# MQTT_BROKER = "wzl-mbroker01.wzl.rwth-aachen.de"
-# MQTT_PORT = 1883
-# MQTT_VHOST = "metrology"
-
-### Ask for settings and individual credentials ###
-
-topic = "#" # set topic to subscribe according to MQTT syntax!
-qos = 0 # set QoS according to MQTT specifications!
-
-logger = Logger()
-
-def print_mqtt_message(topic, message):
-    logger.get('Receiver').info("### {} ###\r\n{}\r\n".format(topic, message.decode("utf-8")))
-
-if __name__=="__main__":
-    client = mqtt.MQTTSubscriber(prefix="bdn-212d8419-c75c-471f-8ea5-f3a5c19ac42e", logger=logger)
-    client.connect(MQTT_BROKER, MQTT_PORT, MQTT_USER, MQTT_PASSWORD, vhost=MQTT_VHOST)
-
-    client.set_callback("PRINT", print_mqtt_message)
-    # client.subscribe(topic, qos)
-
-    while True:
-        try:
-            time.sleep(1)
-        except KeyboardInterrupt:
-            break
-
diff --git a/setup.py b/setup.py
index cc01c2f5571b2eb75171e06bfd244c332f71230d..0a3325aa02959035076fcf4e9716170a9ddd7ad0 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 setup(name='wzl-mqtt',
-      version='2.4.1',
+      version='2.4.2',
       url='',
       author='Benjamin Montavon, Matthias Bodenbenner',
       author_email='m.bodenbenner@wzl.rwth-aachen.de',
diff --git a/src/mqtt/client.py b/src/mqtt/client.py
index ba065ca1ec84790a053a85fad18069b1b29238a6..4ab774f2d49b8e372788d087b42c3bbdfc3d8442 100644
--- a/src/mqtt/client.py
+++ b/src/mqtt/client.py
@@ -96,19 +96,23 @@ class MQTTClient:
         """
         try:
             address = broker
+
             if ssl:
                 self._client.tls_set()
+
             if websocket:
                 self._client._transport = "websockets"
                 fields = address.split("/")
                 address = fields[0]
                 path = "/".join(fields[1:])
-                self._client.ws_set_options(path=path)
+                print(address, path)
+                self._client.ws_set_options(path=f'/{path}')
 
             if vhost != '' and vhost != '/':
                 self._client.username_pw_set(f'{vhost}:{username}', password)
             else:
                 self._client.username_pw_set(username, password)
+
             self._client.connect(address, port, keep_alive)
 
         except Exception as exception: