diff --git a/.travis.yml b/.travis.yml
index 9d07c78..e9378c3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ php:
   - 7.2
   - 7.3
   - 7.4
+  - nightly
 before_install:
   - phpenv config-rm xdebug.ini || true
 
@@ -42,3 +43,4 @@ jobs:
       env: DEPS="dev"
     - php: 7.4
       env: DEPS="dev"
+    - php: 8.0
diff --git a/composer.json b/composer.json
index 1bc0616..4b2db45 100755
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "sort-packages": true
     },
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.1.3 || ^8.0",
         "ext-simplexml": "*",
         "composer/semver": "^1.4 || ^2.0 || ^3.0",
         "composer/package-versions-deprecated": "^1.10",