diff --git a/.travis.yml b/.travis.yml
index 21be090..cdb3081 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,10 @@
 language: php
 php:
-  - '7.1'
-  - '7.2'
-  - '7.4'
+  - "7.1"
+  - "7.2"
+  - "7.4"
+  - "8.0"
+  - "8.1"
 
 before_script:
   - composer install --prefer-dist --dev
diff --git a/composer.json b/composer.json
index f5437fe..9548e93 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,11 @@
 {
   "name": "penance316/merger",
   "description": "Helper to merge date ranges together.",
-  "keywords": ["helper", "date", "merge"],
+  "keywords": [
+    "helper",
+    "date",
+    "merge"
+  ],
   "license": "MIT",
   "type": "library",
   "authors": [
@@ -25,6 +29,6 @@
     "phpunit/phpunit": "^7"
   },
   "require": {
-    "php": "^7.1"
+    "php": "^7.1|^8.0"
   }
 }