diff --git a/examples/flask/requirements.txt b/examples/flask/requirements.txt
index 4385a34..35bc846 100644
--- a/examples/flask/requirements.txt
+++ b/examples/flask/requirements.txt
@@ -2,7 +2,7 @@ arrow==0.12.1
 astroid==2.0.1
 atomicwrites==1.1.5
 attrs==18.1.0
-certifi==2018.4.16
+certifi==2022.12.7
 chardet==3.0.4
 click==6.7
 coverage==4.5.1