diff --git a/README.md b/README.md
index 6817af2..b31f47b 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,6 @@ The program creates coinhistory.db database if it is missing and uses the data f
 The database can be updated by checking UpdateDB and will it then upgrade from existing json file.
 Typically it is good to have the database few hours older than the json file as the DB should be few hours older for some calculations.
 
+cUrl is needed for using json download scripts.
+
 ![Welcome screen](https://github.com/QTinman/CoinBrowser/blob/main/screencap.png)