diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 427c33b..982337b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -7,7 +7,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                php: ['8.0', '8.1', '8.2']
+                php: ['8.0', '8.1', '8.2', '8.3']
 
             fail-fast: false
 
diff --git a/composer.json b/composer.json
index 4da9bad..df8ad21 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
 		}
 	],
 	"require": {
-		"php": ">=8.0 <8.3",
+		"php": "8.0 - 8.3",
 		"ext-json": "*"
 	},
 	"require-dev": {
diff --git a/readme.md b/readme.md
index b2c0bfe..d0820d8 100644
--- a/readme.md
+++ b/readme.md
@@ -37,7 +37,7 @@ Install via Composer:
 composer require nette/neon
 ```
 
-It requires PHP version 8.0 up to 8.2. Documentation can be found on the [website](https://doc.nette.org/neon).
+It requires PHP version 8.0 up to 8.3. Documentation can be found on the [website](https://doc.nette.org/neon).
 
 `Neon::encode()` returns `$value` converted to NEON. As the second parameter `$blockMode` you can pass true, which will create multiline output. The third parameter `$indentation` specifies the characters used for indentation (default is tab).