diff --git a/apps/explorer/priv/repo/migrations/20190219082636_add_indexes_for_block_reward_query.exs b/apps/explorer/priv/repo/migrations/20190219082636_add_indexes_for_block_reward_query.exs
new file mode 100644
index 0000000000..18f06b8999
--- /dev/null
+++ b/apps/explorer/priv/repo/migrations/20190219082636_add_indexes_for_block_reward_query.exs
@@ -0,0 +1,8 @@
+defmodule Explorer.Repo.Migrations.AddIndexesForBlockRewardQuery do
+  use Ecto.Migration
+
+  def change do
+    create(index(:blocks, [:number]))
+    create(index(:emission_rewards, [:block_range]))
+  end
+end