diff --git a/.travis.yml b/.travis.yml
index 292d4ff..9bf1adb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,12 @@ language: php
 php:
   - 7.3
   - 7.4
+  - 8.0
+
+env:
+  global:
+    - COMPOSER_MEMORY_LIMIT=-1
+    - XDEBUG_MODE=coverage
 
 cache:
   directories:
@@ -15,8 +21,8 @@ before_install:
   - echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
 
 install:
-  - COMPOSER_MEMORY_LIMIT=-1 travis_retry composer install --no-interaction --prefer-dist
-  - COMPOSER_MEMORY_LIMIT=-1 travis_retry composer require --no-interaction --prefer-dist --dev php-coveralls/php-coveralls
+  - travis_retry composer install --no-interaction --prefer-dist
+  - travis_retry composer require --no-interaction --prefer-dist --dev php-coveralls/php-coveralls
 
 script: vendor/bin/phpunit --verbose --coverage-clover build/logs/clover.xml
 
diff --git a/composer.json b/composer.json
index 9b7622c..039c012 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         "email": "dmitry.g.ivanov@gmail.com"
     }],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3|^8.0",
         "ext-json": "*",
         "arvenil/ninja-mutex": "^0.6",
         "illuminate/console": "^8.0",