diff --git a/requirements.txt b/requirements.txt
index 1efd3f9..f2cf216 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ backcall==0.2.0
 boutdata==0.1.10
 boututils==0.1.9
 cachetools==5.2.0
-certifi==2022.9.24
+certifi==2023.7.22
 cftime==1.6.2
 charset-normalizer==2.1.1
 clang-format==15.0.4