diff --git a/docs/exercises/express-110-app/problem/requirements.txt b/docs/exercises/express-110-app/problem/requirements.txt
index 9bcc3b2..7e04c66 100644
--- a/docs/exercises/express-110-app/problem/requirements.txt
+++ b/docs/exercises/express-110-app/problem/requirements.txt
@@ -1,2 +1,3 @@
 pandas
-plotly
\ No newline at end of file
+plotly
+statmodels
\ No newline at end of file