diff --git a/mongo/config.go b/mongo/config.go
index 6dc2e30..3cadee9 100644
--- a/mongo/config.go
+++ b/mongo/config.go
@@ -7,7 +7,6 @@ type Conf struct {
 	User                             string
 	Password                         string
 	Host                             string
-	Port                             string
 	Database                         string
 	ReplicaName                      string
 	MaxStaleness                     time.Duration
diff --git a/mongo/doc-db.go b/mongo/doc-db.go
index 95c4c6b..36e80d8 100755
--- a/mongo/doc-db.go
+++ b/mongo/doc-db.go
@@ -34,7 +34,7 @@ func NewDocumentDB(config *Conf, collection string, opts ...mon.Option) (Documen
 		connectionStringTemplate,
 		config.Schema,
 		authenticationURI,
-		fmt.Sprintf("%s:%s", config.Host, config.Port),
+		config.Host,
 	)
 
 	connectUri, _ := url.Parse(connectionURI)