diff --git a/lib/hunter/api/http_client.ex b/lib/hunter/api/http_client.ex
index 3909741..d1bbb11 100644
--- a/lib/hunter/api/http_client.ex
+++ b/lib/hunter/api/http_client.ex
@@ -232,7 +232,7 @@ defmodule Hunter.Api.HTTPClient do
   end
 
   def list_timeline(conn, list, options) do
-    retrieve_timeline(conn, "/api/v1/timelines/list/"++list, options)
+    retrieve_timeline(conn, "/api/v1/timelines/list/#{list}", options)
   end
 
   defp retrieve_timeline(conn, endpoint, options) do