diff --git a/server/mongodb/helper.js b/server/mongodb/helper.js
index 0c15ba13c3e8f82bdd389bd507e207d59605293c..4e461b9ceb4b62d5abf8c6f3dc7066fbba0b32da 100644
--- a/server/mongodb/helper.js
+++ b/server/mongodb/helper.js
@@ -94,21 +94,21 @@ var addConnectionParamsToOptions = function (connection, result) {
     }
 
     if (connection.sslCertificate) {
-        result.server.sslCert = connection.sslCertificate;
+        result.server.sslCert = new Buffer(connection.sslCertificate);
         if (connection.passPhrase) {
             result.server.sslPass = connection.passPhrase;
         }
     }
 
     if (connection.rootCACertificate) {
-        result.server.sslCA = connection.rootCACertificate;
+        result.server.sslCA = new Buffer(connection.rootCACertificate);
         result.server.sslValidate = true;
     } else {
         result.server.sslValidate = false;
     }
 
     if (connection.certificateKey) {
-        result.server.sslKey = connection.certificateKey;
+        result.server.sslKey = new Buffer(connection.certificateKey);
     }
 };
 var convertDatesToString = function (obj) {