diff --git a/ch09/requirements.txt b/ch09/requirements.txt
index a41f48cd4..b42f04228 100644
--- a/ch09/requirements.txt
+++ b/ch09/requirements.txt
@@ -1,5 +1,5 @@
 
-ipython==6.2.1
+ipython==7.16.3
 matplotlib==2.2.2
 pandas==0.22.0
 seaborn==0.8.1
\ No newline at end of file