diff --git a/Chapter 2: Data Understanding Principles/requirements.txt b/Chapter 2: Data Understanding Principles/requirements.txt
index c7b6f4c..e77e5af 100644
--- a/Chapter 2: Data Understanding Principles/requirements.txt	
+++ b/Chapter 2: Data Understanding Principles/requirements.txt	
@@ -2,5 +2,5 @@ pandas==0.23.4
 pandas-profiling==2.3.0
 scikit-learn==0.21.2
 seaborn==0.9.0
-numpy==1.16.4
+numpy==1.22.0
 matplotlib==3.1.0