diff --git a/cryptopt/requirements.txt b/cryptopt/requirements.txt
index 04d8934..1d928a9 100644
--- a/cryptopt/requirements.txt
+++ b/cryptopt/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2018.11.29
+certifi==2022.12.7
 chardet==3.0.4
 decorator==4.3.2
 idna==2.8