1 files changed, 3 insertions, 3 deletions
diff --git a/lib/ex_prometheus_io.ex b/lib/ex_prometheus_io.ex
index 43604ea..9eb7c1c 100644
--- a/lib/ex_prometheus_io.ex
+++ b/lib/ex_prometheus_io.ex
@@ -11,17 +11,17 @@ defmodule ExPrometheusIo do
   end
 
   def range(query, start_ts, end_ts, step, _opts \\ []) do
-    query_opts = [query, start_ts, end_ts, step]
+    query_opts = {query, start_ts, end_ts, step}
     spawn_query(:range, query_opts)
   end
 
   def series(matches, _opts \\ []) when is_list(matches) do
-    spawn_query(:series, [matches])
+    spawn_query(:series, {matches})
   end
 
   defp spawn_query(query, query_opts, _opts \\ []) do
     query_ref = make_ref()
-    query_opts = [query | query_opts] ++ [query_ref, self()]
+    query_opts = [query, query_opts, query_ref, self()]
     {:ok, pid} = Task.Supervisor.start_child(
       ExPrometheusIo.QuerySupervisor,
       ExPrometheusIo.Query,