diff --git a/Chapter01/requirements.txt b/Chapter01/requirements.txt
index e9c5350..009d0f1 100644
--- a/Chapter01/requirements.txt
+++ b/Chapter01/requirements.txt
@@ -8,7 +8,7 @@ black==19.10b0
 blackcellmagic==0.0.2
 bleach==3.1.0
 cachetools==4.0.0
-certifi==2019.11.28
+certifi==2022.12.7
 chardet==3.0.4
 Click==7.0
 cloudpickle==1.2.2