diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0279f10..496ad20 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     timeout-minutes: 5
     strategy:
       matrix:
-        php: ["8.1", "8.2", "8.3"]
+        php: ["8.1", "8.2", "8.3", "8.4"]
     env:
       extensions: mbstring, pcov
       ini: pcov.directory=., "pcov.exclude=\"~(vendor|tests)~\""
diff --git a/composer.json b/composer.json
index 4716a8d..9aa5782 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
 		"source": "https://github.com/getkirby/cli"
 	},
 	"require": {
-		"php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+		"php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
 		"ext-zip": "*",
 		"composer-runtime-api": "^2.2",
 		"guzzlehttp/guzzle": "^7.9.2",
diff --git a/composer.lock b/composer.lock
index ee6b162..4b20d8c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "179b859a5bf3d408e5fe8306058a4c3d",
+    "content-hash": "0f8fe4de12fd58407112d9344df28512",
     "packages": [
         {
             "name": "guzzlehttp/guzzle",
@@ -781,7 +781,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-zip": "*",
         "composer-runtime-api": "^2.2"
     },