diff --git a/requirements.txt b/requirements.txt
index 58578ba..f26d001 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 autopep8==1.3.2
 biopython==1.68
-certifi==2016.9.26
+certifi==2022.12.7
 isort==4.2.15
 jupyter==1.0.0
 numpy>=1.11