diff --git a/requirements.txt b/requirements.txt
index 8664da7d29c45f04abbefe4cd2050e768f139821..9d7748adf401214b95099980aaaecb875e4f153e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,4 @@
 pre-commit
 yapf == 0.28.0
+pandas
+treelib