diff --git a/util/OpsDiagnostics.cs b/util/OpsDiagnostics.cs
index 951bd80..56845ca 100644
--- a/util/OpsDiagnostics.cs
+++ b/util/OpsDiagnostics.cs
@@ -41,15 +41,16 @@ namespace rockfishCore.Util
 
 
         /// <summary>
-        /// check if an ssl cert is within 10 days of expiry
+        /// check if an ssl cert is within 30 days of expiry
+        /// (30 days is the minimum threshold for LetsEncrypt to allow re-up)
         /// </summary>
         /// <param name="url"></param>
-        /// <returns>null if more than 10 days before expiry or the expiry date for display</returns>
+        /// <returns>null if more than 30 days before expiry or the expiry date for display</returns>
         public static DateTime? SSLCertExpiryDate(string url)
         {
             var expires = GetServerCertificateExpiryAsync(url).Result;
-            //In 10 days will we be past the expiry date
-            var deadline = DateTime.Now.AddDays(100);
+            //In 30 days will we be past the expiry date?
+            var deadline = DateTime.Now.AddDays(30);
             if (expires < deadline)
             {
                 return expires;