diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 55f26be..c29b0fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -56,6 +56,10 @@ jobs:
                 name: 'Check PHP coding standards'
                 run: 'castor qa:cs'
 
+            -
+                name: 'Run PHPStan'
+                run: 'castor qa:phpstan'
+
             -
                 name: 'Test HTTP server'
                 run: |
diff --git a/README.md b/README.md
index 14f0106..22a491b 100644
--- a/README.md
+++ b/README.md
@@ -142,7 +142,10 @@ We suggest to:
 
 1. create a composer.json which requires only this tool in `tools/<tool name>/composer.json`;
 
-1. create a symbolic link to the tool executable in `tools/bin/<tool bin>`: `ln -s ../<tool name>/vendor/bin/<tool bin> tools/bin/<tool bin>`;
+1. create an executable symbolic link to the tool from the root directory of the project: `ln -s ../<tool name>/vendor/bin/<tool bin> tools/bin/<tool bin>`;
+
+> **Note**
+> Relative symlinks works here, because the first part of the command is relative to the second part, not to the current directory.
 
 Since `tools/bin` path is appended to the `$PATH`, tools will be available globally in the builder container.
 
diff --git a/phpstan.neon b/phpstan.neon
index 0ab21da..e819040 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -11,7 +11,7 @@ parameters:
 
     # symfony:
     #    container_xml_path: '%rootDir%/../../../../../application/var/cache/dev/App_KernelDevDebugContainer.xml'
-    
+
     typeAliases:
         ContextData: '''
             array{