diff --git a/.github/workflows/test_and_lint.yaml b/.github/workflows/test_and_lint.yaml
index 3a6a2e3..6edc102 100644
--- a/.github/workflows/test_and_lint.yaml
+++ b/.github/workflows/test_and_lint.yaml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - otp: '25'
+          - otp: '24'
             elixir: '1.12'
           - otp: '26'
             elixir: '1.14'
diff --git a/mix.exs b/mix.exs
index 4b07ad0..34d9782 100644
--- a/mix.exs
+++ b/mix.exs
@@ -50,6 +50,7 @@ defmodule ExTwitter.Mixfile do
     [
       {:oauther, "~> 1.3"},
       {:jason, "~> 1.1"},
+      {:castore, "~> 1.0"},
       {:exvcr, "~> 0.14", only: :test},
       {:excoveralls, "~> 0.18", only: :test},
       {:meck, "~> 0.9", only: [:dev, :test]},