diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 120f310b..eb284951 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -138,6 +138,7 @@ jobs:
         php-version:
           - 7.3
           - 7.4
+          - 8.0
 
         dependencies:
           - lowest
diff --git a/composer.json b/composer.json
index 4aff4f85..3c6ca0c6 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         }
     ],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3 || ^8.0",
         "ext-json": "*",
         "psr/cache": "^1.0",
         "psr/http-client": "^1.0",