diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e308261
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,34 @@
+name: test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [5.3.3, 5.3, 5.4, 5.5, 5.6, 7.0, 7.1, 7.2, 7.3, 7.4, 8.0, 8.1]
+        stability: [prefer-stable]
+
+    name: PHP ${{ matrix.php }} - ${{ matrix.stability }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: error_reporting=E_ALL
+          tools: composer:v2
+
+      - name: Install dependencies
+        run: composer install
+
+      - name: Execute tests
+        run: ./vendor/bin/phpunit
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 5d2dbf9..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-language: php
-
-php:
-    - 5.3.3
-    - 5.3
-    - 5.4
-    - 5.5
-    - 5.6
-    - 7.0
-    - 7.1
-    - 7.2
-    - hhvm
-
-script:
-    - composer install
-    - phpunit
diff --git a/composer.json b/composer.json
index 4b1ad58..3353ea4 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,6 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.4"
+        "phpunit/phpunit": "^4.8.35 || ^5.7.21 || ^6.4 || ^7.0 || ^8.0 || ^9.0"
     }
 }