diff --git a/README.md b/README.md
index 3b5bd9b..e9408f3 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ A sample web interface to play with the tool is available at http://tomaszg.pl/g
 
 ### Usage
 
-The main tool is called `geostat`. It is able to access `opencaching.pl` via `OKAPI` or from local database dump maintained by `geodb`. It can also partially read `GPX` files, e.g. exported from `C:GEO`. It produces various statistics (either as text output, or in a HTML form) and renders a heat map of found/not found caches in a selected region. HTML output requires a style sheet. Sample one is included as `geo.css`.
+The main tool is called `geostat`. It is able to access `opencaching.pl` via `OKAPI` or from local database dump maintained by `geodb`. It can also partially read `GPX` files, e.g. exported from [c:geo](https://www.cgeo.org/). It produces various statistics (either as text output, or in a HTML form) and renders a heat map of found/not found caches in a selected region. HTML output requires a style sheet. Sample one is included as `geo.css`.
 
 ```
 Usage: geostat [-o] [-g file] [-qn] [-MDHLTOYh] [-s size] [-m map]