diff --git a/Aptfile b/Aptfile
index 9f04325..a883053 100644
--- a/Aptfile
+++ b/Aptfile
@@ -1 +1,2 @@
 http://archive.ubuntu.com/ubuntu/pool/universe/r/rdkit/python3-rdkit_201903.1-2_amd64.deb
+python-six
diff --git a/requirements.txt b/requirements.txt
index 6fe9ed9..5d06b3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,5 +26,4 @@ lifelines
 scikit-plot
 pymed
 logzero
-six
-git+https://github.com/oddt/oddt
\ No newline at end of file
+oddt
\ No newline at end of file