diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..89529c2
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,14 @@
+image: "python:3.8"
+
+before_script:
+  - python --version
+  - pip3 install flake8
+
+stages:
+  - Static Analysis
+
+flake8:
+  stage: Static Analysis
+  script:
+  - flake8 --max-line-length=120 neohubapi/*.py
+  - flake8 --max-line-length=120 scripts/*.py
diff --git a/neohubapi/__init__.py b/neohubapi/__init__.py
index d7b499b..b671f6d 100644
--- a/neohubapi/__init__.py
+++ b/neohubapi/__init__.py
@@ -1,4 +1,4 @@
 # SPDX-FileCopyrightText: 2020 Andrius Štikonas <andrius@stikonas.eu>
 # SPDX-License-Identifier: LGPL-3.0-or-later
 
-from . import neohub
+from . import neohub  # noqa: F401 # flake8 should ignore this.
diff --git a/neohubapi/neohub.py b/neohubapi/neohub.py
index d1abbea..7d79a99 100644
--- a/neohubapi/neohub.py
+++ b/neohubapi/neohub.py
@@ -6,7 +6,7 @@ import asyncio
 import datetime
 import json
 import logging
-from async_property import async_property, async_cached_property
+from async_property import async_cached_property
 from types import SimpleNamespace
 
 from neohubapi.enums import ScheduleFormat
@@ -196,8 +196,10 @@ class NeoHub:
         message = {"GET_HOLIDAY": 0}
 
         result = await self._send(message)
-        result.start = datetime.datetime.strptime(result.start.strip(), "%a %b %d %H:%M:%S %Y") if result.start else None
-        result.end = datetime.datetime.strptime(result.end.strip(), "%a %b %d %H:%M:%S %Y")  if result.end else None
+        result.start = datetime.datetime.strptime(
+                result.start.strip(), "%a %b %d %H:%M:%S %Y") if result.start else None
+        result.end = datetime.datetime.strptime(
+                result.end.strip(), "%a %b %d %H:%M:%S %Y") if result.end else None
         return result
 
     async def cancel_holiday(self):
@@ -388,7 +390,7 @@ class NeoHub:
         message = {"PERMIT_JOIN": [timeout_s, name]}
         reply = {"result": "network allows joining"}
 
-        result = await self._send(message)
+        result = await self._send(message, reply)
         return result
 
     async def set_lock(self, pin: int, devices: [NeoStat]):
diff --git a/neohubapi/neostat.py b/neohubapi/neostat.py
index 52062fd..8a12ff4 100644
--- a/neohubapi/neostat.py
+++ b/neohubapi/neostat.py
@@ -71,7 +71,7 @@ class NeoStat(SimpleNamespace):
         for a in self._simple_attrs:
             data_attr = a.upper()
             if not hasattr(self._data_, data_attr):
-              self._logger.debug(f"Thermostat object has no attribute {data_attr}")
+                self._logger.debug(f"Thermostat object has no attribute {data_attr}")
             self.__dict__[a] = getattr(self._data_, data_attr, None)
 
         # Renamed attrs