diff --git a/src/cert.py b/src/cert.py
index e41d891..d5fb6be 100644
--- a/src/cert.py
+++ b/src/cert.py
@@ -142,6 +142,7 @@ class CertManager:
             subprocess.check_output(
                 [
                     self.__get_certbot_bin(),
+                    "certonly",
                     "--non-interactive",
                     "--agree-tos",
                     "--webroot",