diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b65ac91..096661c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -35,7 +35,7 @@ jobs:
       matrix:
         include:
           - operating-system: "ubuntu-latest"
-            php-version: "8.1"
+            php-version: "8.3"
 
     steps:
       - name: "Checkout"
@@ -68,7 +68,7 @@ jobs:
       matrix:
         include:
           - operating-system: "ubuntu-latest"
-            php-version: "8.1"
+            php-version: "8.3"
 
     steps:
       - name: "Checkout"
@@ -101,7 +101,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ "ubuntu-latest", "macos-latest", "windows-latest" ]
-        php-version: [ "7.4", "8.0", "8.1" ]
+        php-version: [ "7.4", "8.0", "8.1", "8.2", "8.3" ]
         composer-flags: [ "" ]
         experimental: [ false ]
         include:
@@ -110,8 +110,16 @@ jobs:
             composer-flags: "--prefer-lowest --prefer-stable"
             experimental: false
           - operating-system: "ubuntu-latest"
-            php-version: "8.2"
+            php-version: "8.4"
             composer-flags: "--ignore-platform-req=php+"
+            experimental: true
+          - operating-system: "macos-latest"
+            php-version: "8.3"
+            composer-flags: ""
+            experimental: false
+          - operating-system: "windows-latest"
+            php-version: "8.3"
+            composer-flags: ""
             experimental: false
 
     steps:
@@ -162,7 +170,7 @@ jobs:
       matrix:
         include:
           - operating-system: "ubuntu-latest"
-            php-version: "8.1"
+            php-version: "8.3"
 
     steps:
       - name: "Coveralls"
@@ -182,7 +190,7 @@ jobs:
       matrix:
         include:
           - operating-system: "ubuntu-latest"
-            php-version: "8.1"
+            php-version: "8.3"
 
     steps:
       - name: "Checkout"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2fd710..57f97d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased](https://github.com/orisai/exceptions/compare/1.1.3...v1.x)
 
+## Changed
+
+- Composer
+	- allows PHP 8.3
+
 ## [1.1.3](https://github.com/orisai/exceptions/compare/1.1.2...1.1.3) - 2023-04-08
 
 ## Changed
diff --git a/composer.json b/composer.json
index 6801985..aff9546 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
 		}
 	],
 	"require": {
-		"php": ">=7.4.0 <8.3.0",
+		"php": "7.4 - 8.3",
 		"ext-mbstring": "*",
 		"symfony/polyfill-php80": "^1.18.1"
 	},