diff --git a/docs/cheatsheet.md b/docs/cheatsheet.md
index 1ef20d0..ec9f63f 100644
--- a/docs/cheatsheet.md
+++ b/docs/cheatsheet.md
@@ -8,11 +8,12 @@ Some useful commands for development and testing.
 
 Following commands require `OpenSSL` to be installed. It is provided as `openssl` package in Arch Linux.
 
-Generate self-signed TLS certificate:
+Generate self-signed TLS certificate. Mind the common name (CN) field, it should match the domain name of the server.
+Example for localhost:
 
     openssl req -x509 -newkey rsa:4096 -sha256 -days 365 -noenc \
     -keyout certs/xmpp.key -out certs/xmpp.pem \
-    -subj "/CN=example.com"
+    -subj "/CN=localhost"
 
 Print content of a TLS certificate:
 
@@ -35,4 +36,4 @@ Connecting:
 Password should be the same as in storage.
 Example:
 
-    /connect -nocap 127.0.0.1 6667 parolchik1 kek
\ No newline at end of file
+    /connect -nocap 127.0.0.1 6667 parolchik1 kek