diff --git a/mix.exs b/mix.exs
index b8b64cc..4346ab2 100644
--- a/mix.exs
+++ b/mix.exs
@@ -57,7 +57,7 @@ defmodule Singyeong.Mixfile do
 
       {:dialyxir, "~> 1.2.0", only: [:dev], runtime: false},
       {:credo, "~> 1.6.2", only: [:dev, :test], runtime: false},
-      {:excoveralls, "~> 0.14.0", only: :test},
+      {:excoveralls, "~> 0.15.3", only: :test},
 
       {:singyeong_plugin, "~> 0.1.2"},
       {:lethe, "~> 0.6.0"},
diff --git a/mix.lock b/mix.lock
index 60268ba..407d698 100644
--- a/mix.lock
+++ b/mix.lock
@@ -12,7 +12,7 @@
   "ecto3_mnesia": {:hex, :ecto3_mnesia, "0.2.2", "be16f34f0d26d5075b7394157eedca69afa6be21d8ffd622de84dcd42d32ee0e", [:mix], [{:ecto, "~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:qlc, "~> 1.0", [hex: :qlc, repo: "hexpm", optional: false]}], "hexpm", "2e08f14cc90e4602e69e27340346928e9a752938b7a8122b0dd7219e68b2f6bd"},
   "elixir_uuid": {:hex, :elixir_uuid, "1.2.1", "dce506597acb7e6b0daeaff52ff6a9043f5919a4c3315abb4143f0b00378c097", [:mix], [], "hexpm", "f7eba2ea6c3555cea09706492716b0d87397b88946e6380898c2889d68585752"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
-  "excoveralls": {:hex, :excoveralls, "0.14.6", "610e921e25b180a8538229ef547957f7e04bd3d3e9a55c7c5b7d24354abbba70", [:mix], [{:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "0eceddaa9785cfcefbf3cd37812705f9d8ad34a758e513bb975b081dce4eb11e"},
+  "excoveralls": {:hex, :excoveralls, "0.15.3", "54bb54043e1cf5fe431eb3db36b25e8fd62cf3976666bafe491e3fa5e29eba47", [:mix], [{:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "f8eb5d8134d84c327685f7bb8f1db4147f1363c3c9533928234e496e3070114e"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "fuse": {:hex, :fuse, "2.5.0", "71afa90be21da4e64f94abba9d36472faa2d799c67fedc3bd1752a88ea4c4753", [:rebar3], [], "hexpm", "7f52a1c84571731ad3c91d569e03131cc220ebaa7e2a11034405f0bac46a4fef"},
   "gettext": {:hex, :gettext, "0.19.1", "564953fd21f29358e68b91634799d9d26989f8d039d7512622efb3c3b1c97892", [:mix], [], "hexpm", "10c656c0912b8299adba9b061c06947511e3f109ab0d18b44a866a4498e77222"},