diff --git a/BioArchLinux/avogadroapp/lilac.yaml b/BioArchLinux/avogadroapp/lilac.yaml
index 194b1736c2..09a8437bb7 100644
--- a/BioArchLinux/avogadroapp/lilac.yaml
+++ b/BioArchLinux/avogadroapp/lilac.yaml
@@ -14,3 +14,4 @@ update_on:
   - alias: python
 repo_depends:
   -  python-cclib
+  -  python-periodictable