diff --git a/README.md b/README.md
index a65a2ab..6f3b32d 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,8 @@
 
 Easily ping (wake) an idle Heroku App from slumber.
 
-![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/dwyl/ping/ci.yml?label=build&style=flat-square&branch=master)
-[![codecov.io](https://img.shields.io/codecov/c/github/dwyl/ping/master.svg?style=flat-square)](https://codecov.io/github/dwyl/ping?branch=master)
+![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/dwyl/ping/ci.yml?label=build&style=flat-square&branch=main)
+[![codecov.io](https://img.shields.io/codecov/c/github/dwyl/ping/main.svg?style=flat-square)](https://codecov.io/github/dwyl/ping?branch=main)
 [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat-square)](https://github.com/dwyl/ping/issues)
 [![HitCount](https://hits.dwyl.com/dwyl/ping.svg)](https://github.com/dwyl/ping)
 
diff --git a/mix.exs b/mix.exs
index 313c6e2..7f2be17 100644
--- a/mix.exs
+++ b/mix.exs
@@ -48,7 +48,7 @@ defmodule Ping.MixProject do
       {:phoenix, "~> 1.7.11", only: [:dev, :test]},
 
       # Track coverage: github.com/parroty/excoveralls
-      {:excoveralls, "~> 0.15.0", only: :test},
+      {:excoveralls, "~> 0.18.0", only: :test},
 
       # For publishing Hex.docs:
       {:ex_doc, "~> 0.31.2", only: :dev}
diff --git a/mix.lock b/mix.lock
index 0d2c1cd..2aced31 100644
--- a/mix.lock
+++ b/mix.lock
@@ -3,7 +3,7 @@
   "certifi": {:hex, :certifi, "2.12.0", "2d1cca2ec95f59643862af91f001478c9863c2ac9cb6e2f89780bfd8de987329", [:rebar3], [], "hexpm", "ee68d85df22e554040cdb4be100f33873ac6051387baf6a8f6ce82272340ff1c"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.39", "424642f8335b05bb9eb611aa1564c148a8ee35c9c8a8bba6e129d51a3e3c6769", [:mix], [], "hexpm", "06553a88d1f1846da9ef066b87b57c6f605552cfbe40d20bd8d59cc6bde41944"},
   "ex_doc": {:hex, :ex_doc, "0.31.2", "8b06d0a5ac69e1a54df35519c951f1f44a7b7ca9a5bb7a260cd8a174d6322ece", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.1", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "317346c14febaba9ca40fd97b5b5919f7751fb85d399cc8e7e8872049f37e0af"},
-  "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"},
+  "excoveralls": {:hex, :excoveralls, "0.18.0", "b92497e69465dc51bc37a6422226ee690ab437e4c06877e836f1c18daeb35da9", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "1109bb911f3cb583401760be49c02cbbd16aed66ea9509fc5479335d284da60b"},
   "hackney": {:hex, :hackney, "1.20.1", "8d97aec62ddddd757d128bfd1df6c5861093419f8f7a4223823537bad5d064e2", [:rebar3], [{:certifi, "~> 2.12.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~> 6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~> 1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "fe9094e5f1a2a2c0a7d10918fee36bfec0ec2a979994cff8cfe8058cd9af38e3"},
   "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
   "jason": {:hex, :jason, "1.4.1", "af1504e35f629ddcdd6addb3513c3853991f694921b1b9368b0bd32beb9f1b63", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fbb01ecdfd565b56261302f7e1fcc27c4fb8f32d56eab74db621fc154604a7a1"},