diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5954473..1fe3488 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,36 +1,28 @@
 name: CI
 
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
+on: [push, pull_request]
 
 jobs:
   ci:
-    # Ubuntu 20.04, Erlang/OTP 20-25
-    # https://github.com/erlef/setup-beam
     name: Erlang ${{matrix.otp-version}} / Elixir ${{matrix.elixir-version}}
     runs-on: ubuntu-20.04
     strategy:
       matrix:
         # https://hexdocs.pm/elixir/compatibility-and-deprecations.html
-        elixir-version: [1.14.x, 1.13.x, 1.12.x, 1.11.x, 1.10.x, 1.9.x, 1.8.x]
+        elixir-version: [1.17.x, 1.16.x, 1.15x, 1.14.x, 1.13.x]
         include:
-          - elixir-version: 1.14.x
+          - elixir-version: 1.17.x
             otp-version: 25.x
+          - elixir-version: 1.16.x
+            otp-version: 24.x
+          - elixir-version: 1.15.x
+            otp-version: 24.x
           - elixir-version: 1.13.x
             otp-version: 24.x
-          - elixir-version: 1.12.x
+          - elixir-version: 1.14.x
+            otp-version: 25.x
+          - elixir-version: 1.13.x
             otp-version: 24.x
-          - elixir-version: 1.11.x
-            otp-version: 23.x
-          - elixir-version: 1.10.x
-            otp-version: 22.x
-          - elixir-version: 1.9.x
-            otp-version: 21.x
-          - elixir-version: 1.8.x
-            otp-version: 20.x
     env:
       MIX_ENV: test
     steps: