diff --git a/Aptfile b/Aptfile
index d80e326..9f04325 100644
--- a/Aptfile
+++ b/Aptfile
@@ -1 +1 @@
-python3-rdkit
+http://archive.ubuntu.com/ubuntu/pool/universe/r/rdkit/python3-rdkit_201903.1-2_amd64.deb