diff --git a/n/Newton-X/Newton-X-2.2-B09-intel-2020b.eb b/n/Newton-X/Newton-X-2.2-B09-intel-2020b.eb
index 413f5323..f78f6351 100644
--- a/n/Newton-X/Newton-X-2.2-B09-intel-2020b.eb
+++ b/n/Newton-X/Newton-X-2.2-B09-intel-2020b.eb
@@ -17,6 +17,7 @@ patches = ['newton-x-2.2.patch']
 
 dependencies = [
    ['GSL', '2.6'],
+   ['Gaussian', '09-d01', '-CascadeLake', True],
 ]
 
 install_cmd = 'NX-2.2-B09/install/installnx.pl ifort $EBROOTGSL %(installdir)s 0'