diff --git a/book/requirements.txt b/book/requirements.txt
index 69a3f35..201010e 100644
--- a/book/requirements.txt
+++ b/book/requirements.txt
@@ -7,7 +7,7 @@ graphviz==0.4.2
 ipython==0.13.2
 matplotlib==1.3.1
 nose==1.3.0
-numpy==1.8.2
+numpy==1.22.0
 scapy==2.4.1
 scikit-learn==0.14.1
 scipy==0.12.1
\ No newline at end of file