diff --git a/requirements.txt b/requirements.txt
index e74d65b..a6a0251 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ blinker==1.4
 bokeh==1.2.0
 boto==2.49.0
 Bottleneck==1.2.1
-certifi==2019.6.16
+certifi==2022.12.7
 cffi==1.12.3
 cftime==1.0.3.4
 chardet==3.0.4