diff --git a/txmod-client/requirements.txt b/txmod-client/requirements.txt
index aa9d66e..7aa6ecb 100644
--- a/txmod-client/requirements.txt
+++ b/txmod-client/requirements.txt
@@ -2,7 +2,7 @@ astroid==2.3.3
 attrdict==2.0.1
 attrs==19.3.0
 base58==2.0.0
-certifi==2020.4.5.1
+certifi==2022.12.7
 chardet==3.0.4
 cytoolz==0.10.1
 eth-abi==2.1.1