diff --git a/MD/MembraneLook/requirements.txt b/MD/MembraneLook/requirements.txt
index 43e2603..275734c 100644
--- a/MD/MembraneLook/requirements.txt
+++ b/MD/MembraneLook/requirements.txt
@@ -31,7 +31,7 @@ Bottleneck==1.2.1
 bz2file==0.98
 cachetools==3.1.0
 Cartopy==0.17.0
-certifi==2019.3.9
+certifi==2022.12.7
 cffi==1.11.5
 cftime==1.0.3.4
 chardet==3.0.4