diff --git a/biology/psi88/pkg-descr b/biology/psi88/pkg-descr
index 21dfa84672c9..e664c3b9bfd7 100644
--- a/biology/psi88/pkg-descr
+++ b/biology/psi88/pkg-descr
@@ -6,4 +6,4 @@ Valence semi-empirical, STO-3G, 3-21++G(*) and
 6-31++G(d,p) basis sets are implemented for atoms
 H-Ar.
 
-WWW: http://zarbi.chem.yale.edu/programs/psi88.html
+WWW: http://zarbi.chem.yale.edu/programs/psi88/index.shtml