diff --git a/Surrogate_MBO/requirements.txt b/Surrogate_MBO/requirements.txt
index 3b02b4b..11c551c 100644
--- a/Surrogate_MBO/requirements.txt
+++ b/Surrogate_MBO/requirements.txt
@@ -11,7 +11,7 @@ bleach==3.1.4
 bokeh==1.4.0
 box2d-py==2.3.8
 cachetools==4.0.0
-certifi==2019.9.11
+certifi==2022.12.7
 chardet==3.0.4
 click==7.1.1
 cloudpickle==1.3.0