diff --git a/.gitignore b/.gitignore
index 753c56e6..6730f31e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /nbproject/
 /vendor/
-/build/
\ No newline at end of file
+/build/
+phpstan-phpqa.neon
diff --git a/.phpqa.yml b/.phpqa.yml
index 0f966aa5..b267ee53 100644
--- a/.phpqa.yml
+++ b/.phpqa.yml
@@ -8,6 +8,11 @@ phpcpd:
     minLines: 5
     minTokens: 70
 
+phpstan:
+    level: 0
+    # https://github.com/phpstan/phpstan#configuration
+    # standard: tests/.travis/phpstan.neon
+
 # paths are relative to .phpqa.yml, so don't copy-paste this section if you don't have custom templates
 report:
     phploc: app/report/phploc.xsl
diff --git a/README.md b/README.md
index 41b016f8..2cf2cb41 100644
--- a/README.md
+++ b/README.md
@@ -45,11 +45,14 @@ Tool| Description
 ##### Suggested tools 
 
 Newly added tools aren't preinstalled. You have to install relevant composer packages if
-you want to use.
+you want to use them. 
+Stable tool is executed if composer package is installed. 
+Experimental tool is executed only if the tool is specified in `--tools`.
 
-Tool | Supported since | Description |
----- | --------------- |----------- |
-[parallel-lint](https://github.com/JakubOnderka/PHP-Parallel-Lint) | `>= 1.9` | Check syntax of PHP files |
+Tool | PHP | Supported since | Description | Status |
+---- | --- | --------------- | ----------- | ------ |
+[parallel-lint](https://github.com/JakubOnderka/PHP-Parallel-Lint) | `>= 5.4` | `1.9` | Check syntax of PHP files | stable |
+[phpstan](https://github.com/phpstan/phpstan) | `>= 7.0` | `1.9` | Discover bugs in your code without running it | _experimental_ ([`v0.5`](https://github.com/EdgedesignCZ/phpqa/pull/43)) |
 
 _Tip_: use [`bin/suggested-tools.sh install`](/bin/suggested-tools.sh) for installing the tools.
 
@@ -136,6 +139,7 @@ pdepend | [pdepend-jdepend.xml](https://edgedesigncz.github.io/phpqa/report/pdep
 phpmd | [phpmd.xml](https://edgedesigncz.github.io/phpqa/report/phpmd.xml) | [✓](https://github.com/phpmd/phpmd/blob/master/src/main/php/PHPMD/Renderer/TextRenderer.php#L47) |
 phpmetrics | [phpmetrics.html](https://edgedesigncz.github.io/phpqa/report/phpmetrics.html), [phpmetrics.xml](https://edgedesigncz.github.io/phpqa/report/phpmetrics.xml) | [✓](https://github.com/phpmetrics/PhpMetrics#usage) |
 parallel-lint | [parallel-lint.html](https://edgedesigncz.github.io/phpqa/report/parallel-lint.html) | [✓](https://github.com/JakubOnderka/PHP-Parallel-Lint#example-output) |
+phpstan | [phpstan.html](https://edgedesigncz.github.io/phpqa/report/phpstan.html), [phpstan-phpqa.neon](https://edgedesigncz.github.io/phpqa/report/phpstan-phpqa.neon) | [✓](https://edgedesigncz.github.io/phpqa/report/phpstan.html), [phpstan-phpqa.neon](https://edgedesigncz.github.io/phpqa/report/phpstan-phpqa.neon "Generated configuration is saved in current working directory") |
 
 ## Exit code
 
@@ -152,7 +156,7 @@ or [Circle CI](https://circleci.com/docs/manually/#overview) build should fail w
 Define number of allowed errors for each tools and watch the build:
 
 ```bash
-phpqa --report --tools phpcs:0,phpmd:0,phpcpd:0,parallel-lint:0,phpmetrics,phploc,pdepend
+phpqa --report --tools phpcs:0,phpmd:0,phpcpd:0,parallel-lint:0,phpstan:0,phpmetrics,phploc,pdepend
 ```
 
 **File mode**
@@ -174,6 +178,7 @@ Tool | Settings | Default Value | Your value
 [phpcs](https://pear.php.net/manual/en/package.php.php-codesniffer.usage.php#package.php.php-codesniffer.usage.coding-standard) | Coding standard | PSR2 | Name of existing standard (`PEAR`, `PHPCS`, `PSR1`, `PSR2`, `Squiz`,  `Zend`), or path to your coding standard
 [phpmd](http://phpmd.org/documentation/creating-a-ruleset.html) | Ruleset | [Edgedesign's standard](/app/phpmd.xml) | Path to ruleset
 [phpcpd](https://github.com/sebastianbergmann/phpcpd/blob/de9056615da6c1230f3294384055fa7d722c38fa/src/CLI/Command.php#L136) | Minimum number of lines/tokens for copy-paste detection | 5 lines, 70 tokens | 
+[phpstan](https://github.com/phpstan/phpstan#configuration) | Level, config file | Level 0, `%currentWorkingDirectory%/phpstan.neon` | Take a look at [phpqa config in tests/.travis](/tests/.travis/) |
 
 `.phpqa.yml` is automatically detected in current working directory, but you can specify
 directory via option:
diff --git a/app/report/cli.html.twig b/app/report/cli.html.twig
index fdb77726..6c68bd40 100644
--- a/app/report/cli.html.twig
+++ b/app/report/cli.html.twig
@@ -1,5 +1,5 @@
-<h1>Parallel Lint</h1>
-<pre id="cli">{{ process.getOutput() }}{{ process.getErrorOutput() }}</pre> 
+<h1>{{ tool }}</h1>
+<pre id="cli">{{ process.getOutput() }}</pre> 
  
 <style> 
     html, body { 
diff --git a/bin/ci.sh b/bin/ci.sh
index fc9ca746..45c6fce2 100755
--- a/bin/ci.sh
+++ b/bin/ci.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-./phpqa --verbose --report --tools phpcs:0,phpmd:0,phpcpd:0,parallel-lint:0,phpmetrics,phploc,pdepend
\ No newline at end of file
+./phpqa --verbose --report --config tests/.travis --tools phpcs:0,phpmd:0,phpcpd:0,parallel-lint:0,phpstan:0,phpmetrics,phploc,pdepend
diff --git a/bin/deploy-report.sh b/bin/deploy-report.sh
index 85e3b516..f736b5ce 100755
--- a/bin/deploy-report.sh
+++ b/bin/deploy-report.sh
@@ -29,6 +29,7 @@ copy_artifacts() {
     cp -R build/*.html $repository/report
     cp -R build/*.svg $repository/report
     cp -R build/*.xml $repository/report
+    cp -R build/*.neon $repository/report
 }
 
 publish_changes() {
diff --git a/bin/suggested-tools.sh b/bin/suggested-tools.sh
index ebe40766..4f35585e 100755
--- a/bin/suggested-tools.sh
+++ b/bin/suggested-tools.sh
@@ -9,8 +9,8 @@ mode="$1"
 if [ $mode = "install" ]
 then
     echo "Installing suggested tools"
-    composer require jakub-onderka/php-parallel-lint jakub-onderka/php-console-highlighter
+    composer require jakub-onderka/php-parallel-lint jakub-onderka/php-console-highlighter phpstan/phpstan
 else
     echo "Removing suggested tools"
-    composer remove jakub-onderka/php-parallel-lint jakub-onderka/php-console-highlighter
+    composer remove jakub-onderka/php-parallel-lint jakub-onderka/php-console-highlighter phpstan/phpstan
 fi
diff --git a/composer.json b/composer.json
index a2626f9b..5897a235 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,8 @@
     },
     "suggest": {
         "jakub-onderka/php-parallel-lint": "Check PHP syntax",
-        "jakub-onderka/php-console-highlighter": "Colored output in parallel-lint"
+        "jakub-onderka/php-console-highlighter": "Colored output in parallel-lint",
+        "phpstan/phpstan": "PHP Static Analysis Tool - discover bugs in your code without running it!"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.8",
diff --git a/src/CodeAnalysisTasks.php b/src/CodeAnalysisTasks.php
index 01666d82..29793c00 100644
--- a/src/CodeAnalysisTasks.php
+++ b/src/CodeAnalysisTasks.php
@@ -44,6 +44,12 @@ trait CodeAnalysisTasks
             'hasOnlyConsoleOutput' => true,
             'composer' => 'jakub-onderka/php-parallel-lint',
         ),
+        'phpstan' => array(
+            'optionSeparator' => ' ',
+            'internalClass' => 'PHPStan\Analyser\Analyser',
+            'hasOnlyConsoleOutput' => true,
+            'composer' => 'phpstan/phpstan',
+        ),
     );
     /** @var Options */
     private $options;
@@ -256,6 +262,51 @@ private function parallellint()
         );
     }
 
+    private function phpstan()
+    {
+        $createAbsolutePaths = function (array $relativeDirs) {
+            return array_values(array_filter(array_map(
+                function ($relativeDir) {
+                    return '%currentWorkingDirectory%/' . trim($relativeDir, '"');
+                },
+                $relativeDirs
+            )));
+        };
+
+        $defaultConfig = $this->config->path('phpstan.standard') ?: (getcwd() . '/phpstan.neon');
+        if (file_exists($defaultConfig)) {
+            $params = \Nette\Neon\Neon::decode(file_get_contents($defaultConfig))['parameters'] + [
+                'excludes_analyse' => []
+            ];
+        } else {
+            $params = [
+                'autoload_directories' => $createAbsolutePaths($this->options->getAnalyzedDirs()),
+                'excludes_analyse' => [],
+            ];
+        }
+
+        $params['excludes_analyse'] = array_merge(
+            $params['excludes_analyse'],
+            $createAbsolutePaths($this->options->ignore->phpstan())
+        );
+
+        $neonDir = $this->options->isSavedToFiles ? $this->options->rawFile('') : getcwd();
+        $neonFile = "{$neonDir}/phpstan-phpqa.neon";
+        file_put_contents(
+            $neonFile,
+            "# Configuration generated in phpqa\n" .
+            \Nette\Neon\Neon::encode(['parameters' => $params])
+        );
+
+        return array(
+            'analyze',
+            'ansi' => '',
+            'level' => $this->config->value('phpstan.level'),
+            'configuration' => $neonFile,
+            $this->options->getAnalyzedDirs(' '),
+        );
+    }
+
     private function buildHtmlReport()
     {
         foreach ($this->usedTools as $tool) {
@@ -263,7 +314,10 @@ private function buildHtmlReport()
             if ($tool->hasOnlyConsoleOutput) {
                 twigToHtml(
                     'cli.html.twig',
-                    array('process' => $tool->process),
+                    array(
+                        'tool' => (string) $tool,
+                        'process' => $tool->process
+                    ),
                     $this->options->rawFile("{$tool}.html")
                 );
             } else {
diff --git a/src/Config.php b/src/Config.php
index 4918fc5e..07637577 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -56,7 +56,7 @@ private function get($path, $extractor)
     {
         foreach ($this->configs as $dir => $config) {
             $value = $this->findInConfig($config, $path);
-            if ($value) {
+            if ($value !== null) {
                 return $extractor($value, $dir);
             }
         }
diff --git a/src/IgnoredPaths.php b/src/IgnoredPaths.php
index 6a5fd196..be4d2be4 100644
--- a/src/IgnoredPaths.php
+++ b/src/IgnoredPaths.php
@@ -50,6 +50,11 @@ public function parallelLint()
         return $this->ignore(' --exclude ', ' --exclude ', '');
     }
 
+    public function phpstan()
+    {
+        return $this->ignoreBoth;
+    }
+
     private function ignore($before, $dirSeparator, $after, $fileSeparator = null)
     {
         if ($fileSeparator) {
diff --git a/src/RunningTool.php b/src/RunningTool.php
index db8fe61e..46aa02d0 100644
--- a/src/RunningTool.php
+++ b/src/RunningTool.php
@@ -43,7 +43,7 @@ public function isInstalled()
 
     public function buildOption($arg, $value)
     {
-        if ($value) {
+        if ($value || $value === 0) {
             return "--{$arg}{$this->optionSeparator}{$value}";
         } else {
             return "--{$arg}";
diff --git a/tests/.travis/.phpqa.yml b/tests/.travis/.phpqa.yml
new file mode 100644
index 00000000..2529b4f4
--- /dev/null
+++ b/tests/.travis/.phpqa.yml
@@ -0,0 +1,4 @@
+phpstan:
+    level: 5
+    # https://github.com/phpstan/phpstan#configuration
+    standard: phpstan.neon
diff --git a/tests/.travis/phpstan.neon b/tests/.travis/phpstan.neon
new file mode 100644
index 00000000..8c769ccc
--- /dev/null
+++ b/tests/.travis/phpstan.neon
@@ -0,0 +1,12 @@
+# Required config for analyzing root directory (RobotLoader. throws Nette\InvalidStateException: Ambiguous class)
+#   phpqa --report --output cli --tools phpstan --analyzedDirs ./ --ignoredDirs=vendor
+
+parameters: 
+    bootstrap: %currentWorkingDirectory%/vendor/autoload.php
+    autoload_directories: 
+        - %currentWorkingDirectory%/tests 
+    autoload_files:
+        - %currentWorkingDirectory%/RoboFile.php 
+    ignoreErrors:
+        - '#Call to an undefined method Prophecy\\Prophecy\\ObjectProphecy::[a-zA-Z0-9_]+\(\)#'
+        - '#Access to an undefined property DOMDocument::\$documentElement.#'
diff --git a/tests/Config/ConfigTest.php b/tests/Config/ConfigTest.php
index 7a7636ad..54984e1c 100644
--- a/tests/Config/ConfigTest.php
+++ b/tests/Config/ConfigTest.php
@@ -11,6 +11,7 @@ public function testLoadDefaultConfig()
         assertThat($config->value('phpcpd.minTokens'), is(greaterThan(0)));
         assertThat($config->value('phpcs.standard'), is(nonEmptyString()));
         assertThat($config->path('phpmd.standard'), is(nonEmptyString()));
+        assertThat($config->value('phpstan.level'), identicalTo(0));
     }
 
     public function testBuildAbsolutePath()
diff --git a/tests/RunningToolTest.php b/tests/RunningToolTest.php
index 40dc7dea..4735cdae 100644
--- a/tests/RunningToolTest.php
+++ b/tests/RunningToolTest.php
@@ -11,6 +11,7 @@ public function testBuildOptionWithDefinedSeparator()
         $tool = new RunningTool('tool', ['optionSeparator' => ' ']);
         assertThat($tool->buildOption('option', ''), is('--option'));
         assertThat($tool->buildOption('option', 'value'), is('--option value'));
+        assertThat($tool->buildOption('option', 0), is('--option 0'));
     }
 
     public function testMarkSuccessWhenXPathIsNotDefined()