diff --git a/goes.go b/goes.go
index 6f16b0e..f15000f 100644
--- a/goes.go
+++ b/goes.go
@@ -77,7 +77,7 @@ func (c *Connection) RefreshIndex(name string) (*Response, error) {
 
 // UpdateIndexSettings updates settings for existing index represented by a name and a settings
 // as described here: https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-update-settings.html
-func (c *Connection) UpdateIndexSettings(name string, settings map[string]interface{}) (Response, error) {
+func (c *Connection) UpdateIndexSettings(name string, settings interface{}) (*Response, error) {
 	r := Request{
 		Conn:      c,
 		Query:     settings,
diff --git a/goes_test.go b/goes_test.go
index 89bad3e..fab8df7 100644
--- a/goes_test.go
+++ b/goes_test.go
@@ -187,7 +187,7 @@ func (s *GoesTestSuite) TestUpdateIndexSettings(c *C) {
 	_, err := conn.CreateIndex(indexName, map[string]interface{}{})
 	c.Assert(err, IsNil)
 
-	_, err := conn.UpdateIndexSettings(indexName, map[string]interface{}{
+	_, err = conn.UpdateIndexSettings(indexName, map[string]interface{}{
 		"index": map[string]interface{}{
 			"number_of_replicas": 0,
 		},