diff --git a/setup.cfg b/setup.cfg
index 56b6b62..36cd96b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -24,6 +24,7 @@ install_requires =
     dill >= 0.3.1
     pandas >= 1
     psutil
+    ipywidgets
 
 [options.packages.find]
 exclude =