diff --git a/README.md b/README.md
index b8160b95a25d355f9ec55b47108ecfe3a0364c69..cc2700f2aec71f8eeeb4be7ee1d912f982fda05e 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,8 @@ pip install --extra-index-url https://package-read:gkYP4xrm2PxicUbW1wra@git-ce.r
 ### Publish messages
 
 ```python
+from wzl import mqtt
+
 # username and password required to connect to the broker
 MQTT_USER = ""
 MQTT_PASSWORD = ""
@@ -42,6 +44,8 @@ client.publish(MQTT_USER + "/channel-001", message.encode("utf-8"))
 
 ### Subscribe to topics and receive messages
 ```python
+from wzl import mqtt
+
 # username and password required to connect to the broker
 MQTT_USER = ""
 MQTT_PASSWORD = ""
diff --git a/requirements.txt b/requirements.txt
index 62edbcac908dbe41daf24467c92cf24a77ded286..eb5e41dd416ca6dfd4007d898880ad1595cd127b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+jinja2<=3.1python
 sphinx==3.5.3
 sphinx-rtd-theme==0.5.1
 paho-mqtt==1.5.1
\ No newline at end of file