diff --git a/bundles/sshmon/files/check_https_certificate_at_url b/bundles/sshmon/files/check_https_certificate_at_url
index 7ad2cc3..f494e37 100644
--- a/bundles/sshmon/files/check_https_certificate_at_url
+++ b/bundles/sshmon/files/check_https_certificate_at_url
@@ -20,7 +20,8 @@ case "$issuer_hash" in
     # 4f06f81d: issuer=C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
     # 8d33f237: issuer=C = US, O = Let's Encrypt, CN = R3
     # 462422cf: issuer=C = US, O = Let's Encrypt, CN = E5
-    4f06f81d|8d33f237|462422cf)
+    # 9aad238c: issuer=C = US, O = Let's Encrypt, CN = E6
+    4f06f81d|8d33f237|462422cf|9aad238c)
         warn_days=10
         crit_days=3
         ;;