diff --git a/src/reverseproxy.js b/src/reverseproxy.js
index e9b7d3c6d..60e894fa8 100644
--- a/src/reverseproxy.js
+++ b/src/reverseproxy.js
@@ -366,6 +366,8 @@ async function updateCertBlobs(fqdn, domainObject) {
     await blobs.set(`${blobs.CERT_PREFIX}-${certName}.key`, privateKey);
     await blobs.set(`${blobs.CERT_PREFIX}-${certName}.cert`, cert);
     await blobs.set(`${blobs.CERT_PREFIX}-${certName}.csr`, csr);
+
+    debug(`updateCertBlobs: cert of ${fqdn} was updated`);
 }
 
 async function needsRenewal(fqdn, domainObject) {