diff --git a/.github/settings.yml b/.github/settings.yml
index 1101b3c5..cdd27893 100644
--- a/.github/settings.yml
+++ b/.github/settings.yml
@@ -31,6 +31,9 @@ branches:
           - context: "Tests (8.3, highest)"
           - context: "Tests (8.3, locked)"
           - context: "Tests (8.3, lowest)"
+          - context: "Tests (8.4, highest)"
+          - context: "Tests (8.4, locked)"
+          - context: "Tests (8.4, lowest)"
         strict: false
       restrictions:
 
diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
index 9c6b57f4..9b5dbc4e 100644
--- a/.github/workflows/integrate.yaml
+++ b/.github/workflows/integrate.yaml
@@ -472,6 +472,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
 
         dependencies:
           - "lowest"
diff --git a/composer.json b/composer.json
index dce62c8e..439fed45 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "security": "https://github.com/ergebnis/php-package-template/blob/main/.github/SECURITY.md"
   },
   "require": {
-    "php": "~8.1.0 || ~8.2.0 || ~8.3.0"
+    "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0"
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.44.0",
diff --git a/composer.lock b/composer.lock
index 535027f1..55e334d0 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": "f0d43f62801bf4820cabf573223c1ba5",
+    "content-hash": "1e861f42812cb94376ee63ea9a0de56a",
     "packages": [],
     "packages-dev": [
         {
@@ -7484,13 +7484,13 @@
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": [],
+    "stability-flags": {},
     "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"
     },
-    "platform-dev": [],
+    "platform-dev": {},
     "platform-overrides": {
         "php": "8.1.26"
     },