diff --git a/chapter1/requirements.txt b/chapter1/requirements.txt
index 758bbda..73bf4ef 100644
--- a/chapter1/requirements.txt
+++ b/chapter1/requirements.txt
@@ -72,7 +72,7 @@ mccabe==0.2.1
 meld3==1.0.2
 mygithub==0.0.1
 nose==1.3.7
-numpy==1.12.1
+numpy==1.22.0
 packaging==16.8
 pandas==0.19.2
 paramiko==2.1.2