diff --git a/examples/clustering_users/clustering_requirements.txt b/examples/clustering_users/clustering_requirements.txt
index fc4304d..d10bb0d 100644
--- a/examples/clustering_users/clustering_requirements.txt
+++ b/examples/clustering_users/clustering_requirements.txt
@@ -3,7 +3,7 @@ appnope==0.1.0
 bleach==2.1.1
 numpy==1.13.3
 bokeh==0.12.10
-certifi==2017.7.27.1
+certifi==2022.12.7
 cffi==1.11.2
 chardet==3.0.4
 cycler==0.10.0