diff --git a/README.md b/README.md
index a1ea391e..3dc2ae9c 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,11 @@ Or, if you only want to get one customer, then you would append the customer `id
 Edit `index.php` and change the `$dsn` variable located at the top, here are some examples:
 
 - SQLite: `$dsn = 'sqlite://./path/to/database.sqlite';`
-- MySQL: `$dsn = 'mysql://[user[:pass]@]host[:port]/db/;`
+- MySQL: `$dsn = 'mysql://[user[:pass]@]host[:port]/db/';`
 - PostgreSQL: `$dsn = 'pgsql://[user[:pass]@]host[:port]/db/;`
 
+Databases must not contain dashes.
+
 If you want to restrict access to allow only specific IP addresses, add them to the `$clients` array:
 
 ```php
@@ -205,4 +207,4 @@ ArrestDB is a complete rewrite of [Arrest-MySQL](https://github.com/gilbitron/Ar
 
 ##License (MIT)
 
-Copyright (c) 2014 Alix Axel (alix.axel+github@gmail.com).
\ No newline at end of file
+Copyright (c) 2014 Alix Axel (alix.axel+github@gmail.com).