diff --git a/requirements.txt b/requirements.txt
index 6e4567e..cfb03f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,5 @@
+awkward~=1.4
 matplotlib~=3.4
 scipy~=1.7
 uproot~=4.0
+vector>=0.8.2