diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 52933536..4b264abf 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
         strategy:
             matrix:
                 os: [ubuntu-latest, windows-latest, macOS-latest]
-                php: ['8.0', '8.1', '8.2', '8.3']
+                php: ['8.0', '8.1', '8.2', '8.3', '8.4']
 
             fail-fast: false
 
diff --git a/composer.json b/composer.json
index 9195766d..fe1fa65f 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
 		}
 	],
 	"require": {
-		"php": "8.0 - 8.3"
+		"php": "8.0 - 8.4"
 	},
 	"require-dev": {
 		"ext-simplexml": "*",
diff --git a/readme.md b/readme.md
index b69edaaa..6dcb73d2 100644
--- a/readme.md
+++ b/readme.md
@@ -40,7 +40,7 @@ composer require nette/tester --dev
 
 Alternatively, you can download the [tester.phar](https://github.com/nette/tester/releases) file.
 
-Nette Tester 2.5 is compatible with PHP 8.0 to 8.3. Collecting and processing code coverage information depends on Xdebug or PCOV extension, or PHPDBG SAPI.
+Nette Tester 2.5 is compatible with PHP 8.0 to 8.4. Collecting and processing code coverage information depends on Xdebug or PCOV extension, or PHPDBG SAPI.
 
  <!---->