diff --git a/sys/src/requirements.txt b/sys/src/requirements.txt
index 42697f1..65be9b6 100644
--- a/sys/src/requirements.txt
+++ b/sys/src/requirements.txt
@@ -1,5 +1,5 @@
 cachetools==3.0.0
-certifi==2018.11.29
+certifi==2022.12.7
 chardet==3.0.4
 Click==7.0
 Flask==1.0.2