diff --git a/requirements.txt b/requirements.txt
index e348787..44e73a1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 betfairlightweight==1.10.0
-certifi==2019.6.16
+certifi==2022.12.7
 chardet==3.0.4
 ciso8601==2.0.1
 idna==2.8