diff --git a/requirements.txt b/requirements.txt
index a734219..be7ff95 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 biopython==1.73
-certifi==2019.6.16
+certifi==2022.12.7
 cffi==1.12.3
 cycler==0.10.0
 decorator==4.4.0