diff --git a/README.md b/README.md
index 264f6e7..c49cebd 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ To enable it, add the following lines to your `configuration.yaml`:
 ```yaml
 # Example configuration.yaml entry
 sensor:
-  - platform: prometheus-query
+  - platform: prometheus_query
     name: Temperature Pisa
     prometheus_url: http://localhost:9090
     prometheus_query: temperature{location="Pisa",province="PI",region="Tuscany"}
diff --git a/prometheus_query/manifest.json b/prometheus_query/manifest.json
index bee71bc..61d1be4 100644
--- a/prometheus_query/manifest.json
+++ b/prometheus_query/manifest.json
@@ -3,7 +3,6 @@
   "name": "Prometheus query sensor",
   "version": "2021.06.1",
   "documentation": "https://github.com/lfasci/homeassistant-prometheus-query",
-  "dependencies": "prometheus_client",
   "codeowners": ["lfasci"],
-  "requirements": ["prometheus_client","requests"]
+  "requirements": ["prometheus-client==0.9.0", "requests==2.25.0"]
 }
diff --git a/prometheus_query/sensor.py b/prometheus_query/sensor.py
index 17889b8..98f4318 100644
--- a/prometheus_query/sensor.py
+++ b/prometheus_query/sensor.py
@@ -15,7 +15,6 @@ from homeassistant.const import (
 
 from prometheus_client import Summary
 
-DOMAIN = 'prometheus'
 CONF_PROMETHEUS_URL = 'prometheus_url'
 CONF_PROMETHEUS_QUERY = 'prometheus_query'
 SCAN_INTERVAL = timedelta(seconds=600)