4-CAIVS-user-guide/4.1-Purpose.md

@@ -6,7 +6,7 @@ files](https://gitlab.aip.de/ziegler/NIRVANA/-/wikis/3-NIRVANA-user-guide/3.3-Ou
 into a data format which is more suitable for visualization and
 postprocessing. Various output formats are possible supporting data
 reading in visualization tools like
-[IDL](https://www.l3harrisgeospatial.com/Software-Technology/IDL),
+[IDL](https://www.nv5geospatialsoftware.com/docs/using_idl_home.html),
 [VisIt](https://visit-dav.github.io/visit-website) or
 [ParaView](https://www.paraview.org/).