diff --git a/composer.json b/composer.json
index 7cb3e22..3db077f 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "bin/certainty-cert-symlink"
   ],
   "require": {
-    "php": "^5.5|^7",
+    "php": "^5.5|^7|^8",
     "ext-curl": "*",
     "ext-json": "*",
     "guzzlehttp/guzzle": "^6",