diff --git a/.travis.yml b/.travis.yml
index d3c2bdb..193d0c3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,9 @@
 language: php
 php:
-    - 7.0
     - 7.1
+    - 7.2
+    - 7.3
+    - 7.4
 
 script:
     - vendor/bin/phpstan analyse -l 5 src
diff --git a/composer.json b/composer.json
index d4025d3..a9f7eaa 100644
--- a/composer.json
+++ b/composer.json
@@ -23,14 +23,14 @@
 		}
 	],
 	"require": {
-		"php": "~7.0",
-		"nette/application": "^2.2",
-		"nette/di": "^2.2",
-		"kdyby/console": "^2.3.2",
+		"php": "~7.1",
+		"nette/application": "~2.4.14",
+		"nette/di": "~2.4.14",
+		"kdyby/console": "~2.7.1",
 		"supervisorphp/configuration": "~0.2.1"
 	},
 	"require-dev": {
-		"phpstan/phpstan": "~0.6.0"
+		"phpstan/phpstan": "0.12.11"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/src/Console/RenderCommand.php b/src/Console/RenderCommand.php
index 8234932..19c6227 100644
--- a/src/Console/RenderCommand.php
+++ b/src/Console/RenderCommand.php
@@ -42,6 +42,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
 		 */
 		$configuration = $this->container->getByType(Configuration::class);
 		$output->write($this->getRenderer()->render($configuration->toArray()));
+
+		return 0;
 	}
 
 }
diff --git a/src/Console/WriteCommand.php b/src/Console/WriteCommand.php
index f5108b0..85052dc 100644
--- a/src/Console/WriteCommand.php
+++ b/src/Console/WriteCommand.php
@@ -57,11 +57,17 @@ protected function execute(InputInterface $input, OutputInterface $output)
 				$loader->load($configuration);
 			} catch (LoaderException $exception) {
 				$output->writeln($exception->getMessage());
+
+				return 1;
 			}
 		}
 		if ($writer->write($configuration)) {
 			$output->writeln(sprintf('Supervisor configuration has been successfully written to file %s', $filesystemAdapter->applyPathPrefix($file)));
+
+			return 0;
 		}
+
+		return 1;
 	}
 
 }