diff --git a/minode/advertiser.py b/minode/advertiser.py
index 5f385c8..8d3978f 100644
--- a/minode/advertiser.py
+++ b/minode/advertiser.py
@@ -1,3 +1,6 @@
+"""
+Advertiser thread advertises new addresses and objects among all connections
+"""
 import logging
 import threading
 import time
@@ -6,6 +9,7 @@ from . import message, shared
 
 
 class Advertiser(threading.Thread):
+    """The advertiser thread"""
     def __init__(self):
         super().__init__(name='Advertiser')
 
diff --git a/minode/connection.py b/minode/connection.py
index e760e22..e8ff681 100644
--- a/minode/connection.py
+++ b/minode/connection.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""The logic and behaviour of a single connection"""
 import base64
 import errno
 import logging
@@ -14,6 +15,7 @@ from . import message, shared, structure
 
 
 class Connection(threading.Thread):
+    """The connection object"""
     def __init__(
         self, host, port, s=None, network='ip', server=False,
         i2p_remote_dest=b''
diff --git a/minode/i2p/__init__.py b/minode/i2p/__init__.py
index e71aa66..3fe90a3 100644
--- a/minode/i2p/__init__.py
+++ b/minode/i2p/__init__.py
@@ -1,3 +1,4 @@
+"""A package for working with I2P"""
 from .controller import I2PController
 from .dialer import I2PDialer
 from .listener import I2PListener
diff --git a/minode/listener.py b/minode/listener.py
index 436d48c..88b26db 100644
--- a/minode/listener.py
+++ b/minode/listener.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Listener thread creates connection objects for incoming connections"""
 import logging
 import socket
 import threading
@@ -8,6 +9,7 @@ from .connection import Connection
 
 
 class Listener(threading.Thread):
+    """The listener thread"""
     def __init__(self, host, port, family=socket.AF_INET):
         super().__init__(name='Listener')
         self.host = host
diff --git a/minode/main.py b/minode/main.py
index 84f6f87..cd6b1b4 100644
--- a/minode/main.py
+++ b/minode/main.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Functions for starting the program"""
 import argparse
 import base64
 import csv
@@ -16,11 +17,13 @@ from .listener import Listener
 
 
 def handler(s, f):  # pylint: disable=unused-argument
+    """Signal handler"""
     logging.info('Gracefully shutting down MiNode')
     shared.shutting_down = True
 
 
 def parse_arguments():
+    """Parsing arguments"""
     parser = argparse.ArgumentParser()
     parser.add_argument('-p', '--port', help='Port to listen on', type=int)
     parser.add_argument('--host', help='Listening host')
@@ -100,6 +103,7 @@ def parse_arguments():
 
 
 def load_data():
+    """Loads initial nodes and data, stored in files between sessions"""
     try:
         with open(
             os.path.join(shared.data_directory, 'objects.pickle'), 'br'
@@ -149,6 +153,7 @@ def load_data():
 
 
 def bootstrap_from_dns():
+    """Addes addresses of bootstrap servers to known nodes"""
     try:
         for item in socket.getaddrinfo('bootstrap8080.bitmessage.org', 80):
             shared.unchecked_node_pool.add((item[4][0], 8080))
@@ -165,6 +170,7 @@ def bootstrap_from_dns():
 
 
 def start_ip_listener():
+    """Starts `.listener.Listener`"""
     listener_ipv4 = None
     listener_ipv6 = None
 
@@ -201,6 +207,7 @@ def start_ip_listener():
 
 
 def start_i2p_listener():
+    """Starts I2P threads"""
     # Grab I2P destinations from old object file
     for obj in shared.objects.values():
         if obj.object_type == shared.i2p_dest_obj_type:
@@ -263,6 +270,7 @@ def start_i2p_listener():
 
 
 def main():
+    """Script entry point"""
     signal.signal(signal.SIGINT, handler)
     signal.signal(signal.SIGTERM, handler)
 
diff --git a/minode/manager.py b/minode/manager.py
index 13e1aef..8a1440f 100644
--- a/minode/manager.py
+++ b/minode/manager.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""The main thread, managing connections, nodes and objects"""
 import base64
 import logging
 import os
@@ -14,6 +15,7 @@ from .i2p import I2PDialer
 
 
 class Manager(threading.Thread):
+    """The manager thread"""
     def __init__(self):
         super().__init__(name='Manager')
         self.q = queue.Queue()
diff --git a/minode/message.py b/minode/message.py
index a56ca40..f3d1b4d 100644
--- a/minode/message.py
+++ b/minode/message.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Protocol message objects"""
 import base64
 import hashlib
 import struct
@@ -8,6 +9,7 @@ from . import shared, structure
 
 
 class Header():
+    """Common message header"""
     def __init__(self, command, payload_length, payload_checksum):
         self.command = command
         self.payload_length = payload_length
@@ -43,6 +45,7 @@ class Header():
 
 
 class Message():
+    """Common message structure"""
     def __init__(self, command, payload):
         self.command = command
         self.payload = payload
@@ -85,6 +88,7 @@ class Message():
 
 
 class Version():
+    """The version message"""
     def __init__(
         self, host, port, protocol_version=shared.protocol_version,
         services=shared.services, nonce=shared.nonce,
@@ -155,6 +159,7 @@ class Version():
 
 
 class Inv():
+    """The inv message"""
     def __init__(self, vectors):
         self.vectors = set(vectors)
 
@@ -190,6 +195,7 @@ class Inv():
 
 
 class GetData():
+    """The getdata message"""
     def __init__(self, vectors):
         self.vectors = set(vectors)
 
@@ -225,6 +231,7 @@ class GetData():
 
 
 class Addr():
+    """The addr message"""
     def __init__(self, addresses):
         self.addresses = addresses
 
diff --git a/minode/proofofwork.py b/minode/proofofwork.py
index 9ff3707..f8aa69f 100644
--- a/minode/proofofwork.py
+++ b/minode/proofofwork.py
@@ -1,3 +1,4 @@
+"""Doing proof of work"""
 import base64
 import hashlib
 import logging
diff --git a/minode/shared.py b/minode/shared.py
index 3097a30..851f740 100644
--- a/minode/shared.py
+++ b/minode/shared.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Common variables and structures, referred in different threads"""
 import logging
 import os
 import queue
diff --git a/minode/structure.py b/minode/structure.py
index 027009c..024ea9a 100644
--- a/minode/structure.py
+++ b/minode/structure.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Protocol structures"""
 import base64
 import hashlib
 import logging
@@ -10,6 +11,7 @@ from . import shared
 
 
 class VarInt():
+    """varint object"""
     def __init__(self, n):
         self.n = n
 
@@ -44,6 +46,7 @@ class VarInt():
 
 
 class Object():
+    """object message"""
     def __init__(
         self, nonce, expires_time, object_type, version,
         stream_number, object_payload
@@ -139,6 +142,7 @@ class Object():
 
 
 class NetAddrNoPrefix():
+    """Network address"""
     def __init__(self, services, host, port):
         self.services = services
         self.host = host
@@ -171,6 +175,7 @@ class NetAddrNoPrefix():
 
 
 class NetAddr():
+    """Network address with time and stream"""
     def __init__(self, services, host, port, stream=shared.stream):
         self.stream = stream
         self.services = services