diff --git a/requirements.txt b/requirements.txt
index 60e3a81..df6152e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 backcall==0.1.0
 cachetools==4.1.0
-certifi==2020.4.5.1
+certifi==2022.12.7
 chardet==3.0.4
 click==7.1.1
 cmdstanpy==0.4.0