diff --git a/requirements.txt b/requirements.txt
index 5bc86b3..db48ad4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,4 +39,4 @@ hypercorn==0.17.3
 pydantic-settings==2.7.1
 
 # subs
-certbot==3.1.0
+certbot==4.0.0