diff --git a/src/_dns.py b/src/_dns.py
index c0e6d1d5d779f6e36a3a84fe8c5e5ce2eb45cff6..dacb8e2e775034ee9036f61051eead95af2b24c8 100644
--- a/src/_dns.py
+++ b/src/_dns.py
@@ -1,3 +1,9 @@
+"""Check DNS.
+
+Check name servers, synchronization between them, TCP connection and some
+important records.
+"""
+
 from functools import lru_cache
 import dns.resolver  # pylint: disable=import-error
 import dns.query  # pylint: disable=import-error
diff --git a/src/auth.py b/src/auth.py
index b9aff69e40d745a47a2a39167a71cedd6b7bf916..0f49f2ae2f2c60aa0152fd87815f1a21c508cfd4 100644
--- a/src/auth.py
+++ b/src/auth.py
@@ -1,3 +1,5 @@
+"""Check the auth.shore.co.il web service."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/autoconfig.py b/src/autoconfig.py
index a3404adfc4cef914ed5651ded4733dc2f78c5032..f14466213cdaf3018b11ce09ef5a2766d8297e74 100644
--- a/src/autoconfig.py
+++ b/src/autoconfig.py
@@ -1,3 +1,5 @@
+"""Check the autoconfig.shore.co.il web page."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/elasticsearch.py b/src/elasticsearch.py
index eb301709bcd85201c5988bd5accdf7f8a791880d..8f39cd9498fda42c01007ea121c328f8a68b3304 100644
--- a/src/elasticsearch.py
+++ b/src/elasticsearch.py
@@ -1,3 +1,5 @@
+"""Check the Elasticsearch service."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/gitlab.py b/src/gitlab.py
index c872a31e5311f652abdc25523ef03e9cc3e14636..f55c5f460c4eea3a24f7ccf6890d41cef84639a7 100644
--- a/src/gitlab.py
+++ b/src/gitlab.py
@@ -1,3 +1,5 @@
+"""Check Gitlab."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/imap.py b/src/imap.py
index 57fbcb1c1ba63a9e3b43e631f594380a6147b6b1..cce71b42b3297d3c2953ab79c9d6553c9046084f 100644
--- a/src/imap.py
+++ b/src/imap.py
@@ -1,3 +1,5 @@
+"""Check IMAP."""
+
 from imaplib import IMAP4_SSL
 from utils import Check
 
diff --git a/src/kibana.py b/src/kibana.py
index d41683dbc630964bb0778c179413acdbd0f7cb64..e9695d9f6263cb0e08703c517feef401ed0c089a 100644
--- a/src/kibana.py
+++ b/src/kibana.py
@@ -1,3 +1,5 @@
+"""Check Kibana."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/kodi.py b/src/kodi.py
index df903c24e97550a4fab16787de61dfce9fc98cf4..0fd9c1fe979974e94361f8edf02def7b21d18c45 100644
--- a/src/kodi.py
+++ b/src/kodi.py
@@ -1,3 +1,5 @@
+"""Check Kodi."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/mta_sts.py b/src/mta_sts.py
index 4d9d0737409f7c7033c61d6faa81d983478ddb93..3054ceb8bb21c474f17683692a6e3e08d0064e26 100644
--- a/src/mta_sts.py
+++ b/src/mta_sts.py
@@ -1,3 +1,5 @@
+"""Check MTA-STS web page."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/myip.py b/src/myip.py
index f2f90ed4e91856aaaff03b9ca38eaf7bc53dbb0c..13385fac9acd6c00b46d58d279a10042202186b2 100644
--- a/src/myip.py
+++ b/src/myip.py
@@ -1,3 +1,5 @@
+"""Check the MyIP web service."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/nextcloud.py b/src/nextcloud.py
index c5d29a897d4c8af35868ec4b218daa0fc02f2216..928f0a92c6f439bd9524d77a16b724ef8cefc1c0 100644
--- a/src/nextcloud.py
+++ b/src/nextcloud.py
@@ -1,3 +1,5 @@
+"""Check Nextcloud."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/notify.py b/src/notify.py
index ffdfcde7580013bc776bbfba04d70074ffb873fb..6a11d1672355c0d64521c5a37d416a96bbba04a0 100644
--- a/src/notify.py
+++ b/src/notify.py
@@ -1,3 +1,5 @@
+"""Check the notify web service."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/registry.py b/src/registry.py
index 59266201c2ff2aec5e0beb7617da2575e2e08952..c2390832647f704c488243ddff2667cf6dc0a8e0 100644
--- a/src/registry.py
+++ b/src/registry.py
@@ -1,3 +1,5 @@
+"""Check the container image registry and frontend."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/smtp.py b/src/smtp.py
index 20afdf153bcf1d0f4f62b4d556dd541e7d1df197..a2952ce42f40673ef841f08175bc734a41ec9b83 100644
--- a/src/smtp.py
+++ b/src/smtp.py
@@ -1,3 +1,5 @@
+"""Check SMTP."""
+
 from smtplib import SMTP
 from utils import Check
 
diff --git a/src/ssh.py b/src/ssh.py
index 38e92d7616685a74830aed1e2bf6e3acf61ccf22..1824b2ae1d825be9c756388e23c7c232b99f9405 100644
--- a/src/ssh.py
+++ b/src/ssh.py
@@ -1,3 +1,5 @@
+"""Check SSH."""
+
 import socket
 from utils import Check
 
diff --git a/src/transmission.py b/src/transmission.py
index 3d53e3de2776bfce2ed814c537b29c6dc07021c0..97eca3246cb09c66375efdc54bf2f0d9dc930d49 100644
--- a/src/transmission.py
+++ b/src/transmission.py
@@ -1,3 +1,5 @@
+"""Check the Transmission web service."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/utils.py b/src/utils.py
index c764dabdfbabcb2b9a8a788751310d6ba9505677..c89283e745bcd6d1e718b494031557ea967eae8d 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -1,3 +1,5 @@
+"""Utilities for common checks."""
+
 import os
 import boto3  # pylint: disable=import-error
 import requests  # pylint: disable=import-error,useless-suppression
diff --git a/src/vouch.py b/src/vouch.py
index e689a0f0a17aa396691b2b2ab1986acc894d6bc9..c00cc4802e6365feeb4966803293cccbe776c522 100644
--- a/src/vouch.py
+++ b/src/vouch.py
@@ -1,3 +1,5 @@
+"""Check the Vouch service."""
+
 from utils import website_handler
 
 URLS = [
diff --git a/src/www.py b/src/www.py
index e675d733567e94777ff083c1a33e5f7748c2cc05..9180bddbce01404b71eb33dbe66c6b11264d3fe5 100644
--- a/src/www.py
+++ b/src/www.py
@@ -1,3 +1,5 @@
+"""Check the shore.co.il and www.shore.co.il web sites."""
+
 from utils import website_handler
 
 URLS = [