diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 84b29cb..251c509 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ on:
 
 jobs:
   main:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
@@ -20,6 +20,8 @@ jobs:
             erlang: '25.3.2.12'
           - elixir: '1.14'
             erlang: '24.3.4.17'
+          - elixir: '1.13'
+            erlang: '23.3.4.20'
     steps:
       - uses: actions/checkout@v4
       - uses: actions/cache@v4
diff --git a/mix.exs b/mix.exs
index 5b1f707..3455329 100644
--- a/mix.exs
+++ b/mix.exs
@@ -10,7 +10,7 @@ defmodule TowerRollbar.MixProject do
       app: :tower_rollbar,
       description: @description,
       version: @version,
-      elixir: "~> 1.14",
+      elixir: "~> 1.13",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       package: package(),