diff --git a/README.md b/README.md
index 0a106059..621624f4 100644
--- a/README.md
+++ b/README.md
@@ -333,6 +333,7 @@ following rules are enabled by default:
 * `tmux` – fixes `tmux` commands;
 * `unknown_command` – fixes hadoop hdfs-style "unknown command", for example adds missing '-' to the command on `hdfs dfs ls`;
 * `unsudo` – removes `sudo` from previous command if a process refuses to run on superuser privilege.
+* `upper_to_lowercase` – replaces the uppercase letters with lowercase, if all the srcipt is typed in uppercase letters;
 * `vagrant_up` – starts up the vagrant instance;
 * `whois` – fixes `whois` command;
 * `workon_doesnt_exists` – fixes `virtualenvwrapper` env name os suggests to create new.