diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d25c2d2..f958946 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -3,12 +3,16 @@
 Contributions are very welcome. If you would like to add functionality, before starting your work,
 please open an issue to discuss the feature you would like to work on.
 
+All development tools can be executed via `make` commands.
+All those commands ensure, you use the correct PHP version and the dependencies.
+To achieve this, the commands use the [Symfony CLI](https://github.com/symfony-cli/symfony-cli), so please make sure you have it installed.
+
 #### Coding standards
 
 Check coding standards with [PHP CS Fixer](https://github.com/FriendsOfPHP/PHP-CS-Fixer).
 
 ```
-php-cs-fixer fix src
+make cs
 ```
 
 #### Code Documentation
@@ -17,10 +21,10 @@ Document your code with [phpDocumentor](https://github.com/phpDocumentor/phpDocu
 
 #### Static Analysis
 
-Analyze your code with [PHPStan](https://github.com/phpstan/phpstan) and make sure there are no errors except for `buildCurlPostFields` method.
+Analyze your code with [PHPStan](https://github.com/phpstan/phpstan).
 
 ```
-phpstan analyse src --level 5
+make static-code-analysis
 ```
 
 #### Test
diff --git a/Makefile b/Makefile
index 925817a..38d86d9 100644
--- a/Makefile
+++ b/Makefile
@@ -3,16 +3,28 @@
 help: ## Displays this list of targets with descriptions
 	@grep -E '^[a-zA-Z0-9_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[32m%-30s\033[0m %s\n", $$1, $$2}'
 
+.PHONY: check-symfony
+check-symfony: ## Checks if the symfony binary is installed
+	@command -v symfony >/dev/null 2>&1 || { echo >&2 "Symfony binary is not installed. Please install it first. https://github.com/symfony-cli/symfony-cli"; exit 1; }
+
 .PHONY: cs
-cs: vendor ## Normalizes composer.json with ergebnis/composer-normalize and fixes code style issues with friendsofphp/php-cs-fixer
-	composer normalize
+cs: check-symfony vendor ## Normalizes composer.json with ergebnis/composer-normalize and fixes code style issues with friendsofphp/php-cs-fixer
+	symfony composer normalize
 	mkdir -p .build/php-cs-fixer
-	php vendor/bin/php-cs-fixer fix --config=.php-cs-fixer.dist.php --diff --verbose
+	symfony php vendor/bin/php-cs-fixer fix --config=.php-cs-fixer.dist.php --diff --verbose
 
 .PHONY: static-code-analysis
-static-code-analysis: vendor ## Runs a static code analysis with phpstan/phpstan
-	php vendor/bin/phpstan analyse --configuration=phpstan-default.neon.dist --memory-limit=-1
+static-code-analysis: check-symfony vendor ## Runs a static code analysis with phpstan/phpstan
+	symfony php vendor/bin/phpstan analyse --configuration=phpstan-default.neon.dist --memory-limit=-1
 
 .PHONY: static-code-analysis-baseline
-static-code-analysis-baseline: vendor ## Generates a baseline for static code analysis with phpstan/phpstan
-	php vendor/bin/phpstan analyze --configuration=phpstan-default.neon.dist --generate-baseline=phpstan-default-baseline.neon --memory-limit=-1
+static-code-analysis-baseline: check-symfony vendor ## Generates a baseline for static code analysis with phpstan/phpstan
+	symfony php vendor/bin/phpstan analyze --configuration=phpstan-default.neon.dist --generate-baseline=phpstan-default-baseline.neon --memory-limit=-1
+
+.PHONY: tests
+tests: check-symfony vendor
+	symfony php vendor/bin/phpunit tests
+
+.PHONY: vendor
+vendor: composer.json composer.lock ## Installs composer dependencies
+	symfony composer install