diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cdca0c074..b0ba598ff 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
         strategy:
             matrix:
                 os: [ubuntu-latest, windows-latest]
-                php: ['8.2', '8.3', '8.4', '8.5']
+                php: ['8.2', '8.3', '8.4', '8.5', '8.6']
 
             fail-fast: false
 
@@ -33,7 +33,6 @@ jobs:
     code_coverage:
         name: Code Coverage
         runs-on: ubuntu-latest
-        continue-on-error: true
         steps:
             - uses: actions/checkout@v6
             - uses: shivammathur/setup-php@v2
@@ -44,7 +43,8 @@ jobs:
 
             - run: composer install --no-progress --prefer-dist
             - run: composer tester -- -p phpdbg --coverage ./coverage.xml --coverage-src ./src
-            - run: wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.4.3/php-coveralls.phar
-            - env:
-                  COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-              run: php php-coveralls.phar --verbose --config tests/.coveralls.yml
+              continue-on-error: true
+            - uses: coverallsapp/github-action@v2
+              with:
+                  file: coverage.xml
+                  format: clover
diff --git a/AGENTS.md b/AGENTS.md
index f37d41698..ff0d42471 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -20,7 +20,7 @@ Nette Utils is a standalone PHP utility library: strings, arrays/iterables, HTML
 generation, images, JSON, validation, filesystem, file search, and process
 execution.
 
-- **PHP Version**: 8.2 - 8.5
+- **PHP Version**: 8.2 - 8.6
 - **Package**: `nette/utils`
 
 ## Essential Commands
diff --git a/composer.json b/composer.json
index 7014841ff..b881ec68a 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
 		}
 	],
 	"require": {
-		"php": "8.2 - 8.5"
+		"php": "8.2 - 8.6"
 	},
 	"require-dev": {
 		"nette/tester": "^2.5",
diff --git a/readme.md b/readme.md
index 8c717be42..f34633e12 100644
--- a/readme.md
+++ b/readme.md
@@ -41,7 +41,7 @@ The recommended way to install is via Composer:
 composer require nette/utils
 ```
 
-Nette Utils 4.1 is compatible with PHP 8.2 to 8.5.
+Nette Utils 4.1 is compatible with PHP 8.2 to 8.6.
 
  <!---->
 
diff --git a/tests/.coveralls.yml b/tests/.coveralls.yml
deleted file mode 100644
index 845038250..000000000
--- a/tests/.coveralls.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-# for php-coveralls
-service_name: github-actions
-coverage_clover: coverage.xml
-json_path: coverage.json