diff --git a/requirements.txt b/requirements.txt
index 87b1a84..010c51c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2019.9.11
+certifi==2022.12.7
 chardet==3.0.4
 colorzero==1.1
 gpiozero==1.5.1