diff --git a/mix.exs b/mix.exs
index 001780a..e4b1958 100644
--- a/mix.exs
+++ b/mix.exs
@@ -64,7 +64,7 @@ defmodule App.MixProject do
       # Easily Encrypt Senstive Data: github.com/dwyl/fields
       {:fields, "~> 2.10.3"},
       # Useful functions: github.com/dwyl/useful
-      {:useful, "~> 1.14.0", override: true},
+      {:useful, "~> 1.15.0", override: true},
 
       # JSON Parsing: https://hex.pm/packages/poison
       {:poison, "~> 6.0.0"},
diff --git a/mix.lock b/mix.lock
index abc668d..fa2c9e4 100644
--- a/mix.lock
+++ b/mix.lock
@@ -64,7 +64,7 @@
   "telemetry_poller": {:hex, :telemetry_poller, "1.1.0", "58fa7c216257291caaf8d05678c8d01bd45f4bdbc1286838a28c4bb62ef32999", [:rebar3], [{:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "9eb9d9cbfd81cbd7cdd24682f8711b6e2b691289a0de6826e58452f28c103c8f"},
   "tentacat": {:hex, :tentacat, "2.2.0", "ed2f137c3f64a787cd278ccb1ddbb9e5b696c9c09e3c89d559fffa64ad1494b8", [:mix], [{:httpoison, "~> 1.0", [hex: :httpoison, repo: "hexpm", optional: false]}, {:jason, "~> 1.2", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "b4ca367af4769774c7dd24a53738f20603012c03715be6c23d8e22c220ee8c07"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.7.0", "bc84380c9ab48177092f43ac89e4dfa2c6d62b40b8bd132b1059ecc7232f9a78", [:rebar3], [], "hexpm", "25eee6d67df61960cf6a794239566599b09e17e668d3700247bc498638152521"},
-  "useful": {:hex, :useful, "1.14.0", "78a2dbeafe1a805ce6d430bbaddf52c64ec7aed06b5b5ebb4e8dbd8b885f4808", [:mix], [{:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "0e8fe3a0843b0201cb556fbce9ead0f9b1dc5cf3afe00b52a4d6789654cca588"},
+  "useful": {:hex, :useful, "1.15.0", "3c967dd3013d710538f37ec9ae5d074a4ee19add367172e0dff22c0f72ea30bd", [:mix], [{:plug, "~> 1.16", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "900180dc839831fa82717ee25ae3d912656095a58fb8a4bed8975495516b8dd0"},
   "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},
   "websock_adapter": {:hex, :websock_adapter, "0.5.8", "3b97dc94e407e2d1fc666b2fb9acf6be81a1798a2602294aac000260a7c4a47d", [:mix], [{:bandit, ">= 0.6.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.6", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "315b9a1865552212b5f35140ad194e67ce31af45bcee443d4ecb96b5fd3f3782"},
 }