diff --git a/requirements.txt b/requirements.txt
index 5ec29bf..7a63d61 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 setuptools>=41.6.0
-certbot>=1.18.0,<6.0
+certbot>=4.2.0,<6.0
 pkb_client>=2.0,<3.0
 dnspython>=2.0.0,<3.0
 tldextract>=5.1.2,<6.0