diff --git a/requirements.txt b/requirements.txt
index e1d1c3d..07fe93a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ bottle==0.12.18
 Bottleneck==1.2.1
 branca==0.3.1
 business-calendar==0.2.1
-certifi==2019.9.11
+certifi==2022.12.7
 cffi==1.11.5
 chardet==3.0.4
 Click==7.0