diff --git a/.laminas-ci.json b/.laminas-ci.json
index 419e3229..17e30dc2 100644
--- a/.laminas-ci.json
+++ b/.laminas-ci.json
@@ -1,6 +1,7 @@
 {
   "ignore_php_platform_requirements": {
-    "8.3": false
+    "8.3": false,
+    "8.4": true
   },
   "backwardCompatibilityCheck": true
 }
diff --git a/composer.json b/composer.json
index f90171a1..20d10c6c 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
         }
     },
     "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-intl": "*",
         "laminas/laminas-servicemanager": "^3.21.0",
         "laminas/laminas-stdlib": "^3.0",
diff --git a/composer.lock b/composer.lock
index fcb26037..df6e35fb 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": "589961f1746a8e94e4442bcfdb401934",
+    "content-hash": "f1b44b8e5a020fa4e117b5e0af7e7c82",
     "packages": [
         {
             "name": "laminas/laminas-servicemanager",
@@ -5142,7 +5142,7 @@
     "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-intl": "*"
     },
     "platform-dev": [],
diff --git a/docs/book/installation.md b/docs/book/installation.md
index 65d335af..b34281f5 100644
--- a/docs/book/installation.md
+++ b/docs/book/installation.md
@@ -1,5 +1,5 @@
-**This is only a placeholder.**
+# This is only a placeholder
 
 The content of this page can be found under:
 
-https://github.com/laminas/documentation-theme/blob/master/theme/pages/installation.html
\ No newline at end of file
+https://github.com/laminas/documentation-theme/blob/master/theme/pages/installation.html