diff --git a/lib/options.js b/lib/options.js
index 56c7a6e..583b0bc 100755
--- a/lib/options.js
+++ b/lib/options.js
@@ -106,6 +106,9 @@ function modernize(legacy) {
     if (legacy.secure.hasOwnProperty('certPath')) {
       modernized.credentials.certPath = legacy.secure.certPath;
     }
+    if (legacy.secure.hasOwnProperty('secureProtocol')) {
+      modernized.credentials.secureProtocol = legacy.secure.secureProtocol;
+    }
   } // else no credentials were provided
 
   // construct `interfaces`