diff --git a/pydata-book/requirements.txt b/pydata-book/requirements.txt
index 0aebcf68..61f3339d 100644
--- a/pydata-book/requirements.txt
+++ b/pydata-book/requirements.txt
@@ -1,4 +1,4 @@
-numpy==1.13.3
+numpy==1.22.0
 pandas==0.21.0
 matplotlib==2.1.0
 lxml==4.1.0