diff --git a/client_response.go b/client_response.go
index 4c81e72d..c2e82f96 100644
--- a/client_response.go
+++ b/client_response.go
@@ -27,7 +27,7 @@ type ClientResponse interface {
 	Code() int
 	Message() string
 	GetHeader(string) string
-	GetHeaders(string) string
+	GetHeaders(string) []string
 	Body() io.ReadCloser
 }