diff --git a/README.md b/README.md
index 80fd626..59eb6e5 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # ZotMeta: Metadata update tool 
-ZotMeta is a Zotero plugin to update articles metadata. 
+ZotMeta is a Zotero plugin to update articles(based on doi) and books(based on isbn) metadata. 
 
 # Credits
 Special thanks to [make-it-red](https://github.com/zotero/make-it-red/tree/main), which is the base of the add-on.