diff --git a/.github/workflows/hassfest.yaml b/.github/workflows/hassfest.yaml
new file mode 100644
index 0000000..b37567b
--- /dev/null
+++ b/.github/workflows/hassfest.yaml
@@ -0,0 +1,12 @@
+name: Validate with hassfest
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  validate:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v2"
+      - uses: home-assistant/actions/hassfest@master
\ No newline at end of file
diff --git a/custom_components/greenely/sensor.py b/custom_components/greenely/sensor.py
index c3eacec..6b0ef90 100644
--- a/custom_components/greenely/sensor.py
+++ b/custom_components/greenely/sensor.py
@@ -1,8 +1,8 @@
-import json
-import logging
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta
 
 import requests
+import json
+import logging
 import voluptuous as vol
 
 import homeassistant.helpers.config_validation as cv