diff --git a/.travis.yml b/.travis.yml
index e4ad679..2d6c77b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,9 +17,10 @@ matrix:
     - php: 7.2
     - php: 7.3
     - php: 7.4
+    - php: nightly
 
 before_install:
-  - if [[ "$TRAVIS_PHP_VERSION" != "hhvm" && "$xdebug" != "yes" ]]; then phpenv config-rm xdebug.ini; fi
+  - if [[ "$TRAVIS_PHP_VERSION" != "nightly" && "$xdebug" != "yes" ]]; then phpenv config-rm xdebug.ini; fi
   - composer self-update
 
 install:
diff --git a/composer.json b/composer.json
index 1b07ac4..3ec4bda 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": "^5.6 || ^7.0",
+        "php": "^5.6 || ^7.0 || ^8.0",
         "api-clients/psr7-oauth1": "^2.0 || ^1.0",
         "php-http/message": "^1.0"
     },