diff --git a/.travis.yml b/.travis.yml
index 47c21c1..e184812 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,8 @@ matrix:
           env: PREFER="--prefer-lowest"
         - php: 7.1
         - php: 7.2
-        - php: 7.3
+        - php: 7.4
+        - php: 8.0
 
 cache:
   directories:
diff --git a/composer.json b/composer.json
index f6a638c..83ce250 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
         }
     },
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.1.3 || ^8.0",
         "florianv/swap": "^4.0"
     },
     "require-dev": {