diff --git a/README.md b/README.md
index e0b3de8..0a239ad 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,9 @@ Schedule this backup script to run with a crontab entry, for example:
 Which will run at 2:30 each Wednesday.
 
 # Config
-The config file `.config.json` is used to define parameters and which directories to archive (in autorun mode).
+The config file (`.config.json` by default) is used to define which directories to archive with parameters.
+
+Directories are specified as an array of objects, each object has key value properties with the following format:
 
 ```json
 [