diff --git a/README.md b/README.md
index abdca1b477d..4cc071113e2 100644
--- a/README.md
+++ b/README.md
@@ -181,6 +181,18 @@ parameters:
     php_version_features: '7.2' # your version is 7.3
 ```
 
+### Paths
+
+If you're annoyed by repeating paths in arguments, you can move them to config instead:
+
+```yaml
+# rector.yaml
+parameters:
+    paths:
+        - 'src'
+        - 'tests'
+```
+
 ### Import Use Statements
 
 FQN classes are imported by default every time Rector performs a change,  so you don't have to do it manually/after each run. You can disable it by:
diff --git a/composer.json b/composer.json
index 1fa2f0d77f2..79073a9dbee 100644
--- a/composer.json
+++ b/composer.json
@@ -200,7 +200,7 @@
             "bin/rector dump-rectors -o markdown > docs/AllRectorsOverview.md",
             "bin/rector dump-nodes -o markdown > docs/NodesOverview.md"
         ],
-        "rector": "bin/rector process packages src tests --config rector-ci.yaml --dry-run"
+        "rector": "bin/rector process --config rector-ci.yaml --dry-run"
     },
     "scripts-descriptions": {
         "docs": "Regenerate descriptions of all Rectors to docs/AllRectorsOverview.md file"
diff --git a/config/config.yaml b/config/config.yaml
index 67928553157..36dc626b37d 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -5,6 +5,8 @@ imports:
     - { resource: '../utils/**/config/config.yaml', ignore_errors: true }
 
 parameters:
+    # processed paths
+    paths: []
     exclude_paths: []
     exclude_rectors: []
     autoload_paths: []
@@ -16,6 +18,8 @@ parameters:
     # e.g. /** @var \Some\ClassHere */
     import_doc_blocks: true
 
-    php_version_features: ~ # what PHP version should be used for features, local PHP version is used by default
+    # what PHP version is used for features, composer.json version, then local PHP version is used by default
+    php_version_features: ~
+
     file_extensions:
         - 'php'
diff --git a/rector-ci.yaml b/rector-ci.yaml
index 5258d68d055..57c537c26c2 100644
--- a/rector-ci.yaml
+++ b/rector-ci.yaml
@@ -5,6 +5,11 @@ parameters:
         - 'dead-code'
         - 'nette-utils-code-quality'
 
+    paths:
+        - 'src'
+        - 'packages'
+        - 'tests'
+
     exclude_paths:
         - '/Fixture/'
         - '/Source/'
diff --git a/src/Console/Command/ProcessCommand.php b/src/Console/Command/ProcessCommand.php
index 736f2d69373..ef73219de87 100644
--- a/src/Console/Command/ProcessCommand.php
+++ b/src/Console/Command/ProcessCommand.php
@@ -81,6 +81,12 @@ final class ProcessCommand extends AbstractCommand
     private $stubLoader;
 
     /**
+     * @var string[]
+     */
+    private $paths = [];
+
+    /**
+     * @param string[] $paths
      * @param string[] $fileExtensions
      */
     public function __construct(
@@ -94,6 +100,7 @@ final class ProcessCommand extends AbstractCommand
         ReportingExtensionRunner $reportingExtensionRunner,
         RectorNodeTraverser $rectorNodeTraverser,
         StubLoader $stubLoader,
+        array $paths,
         array $fileExtensions
     ) {
         $this->filesFinder = $phpFilesFinder;
@@ -109,6 +116,7 @@ final class ProcessCommand extends AbstractCommand
         $this->stubLoader = $stubLoader;
 
         parent::__construct();
+        $this->paths = $paths;
     }
 
     protected function configure(): void
@@ -117,7 +125,7 @@ final class ProcessCommand extends AbstractCommand
         $this->setDescription('Upgrade or refactor source code with provided rectors');
         $this->addArgument(
             Option::SOURCE,
-            InputArgument::REQUIRED | InputArgument::IS_ARRAY,
+            InputArgument::OPTIONAL | InputArgument::IS_ARRAY,
             'Files or directories to be upgraded.'
         );
         $this->addOption(
@@ -160,7 +168,7 @@ final class ProcessCommand extends AbstractCommand
         $this->rectorGuard->ensureSomeRectorsAreRegistered();
         $this->stubLoader->loadStubs();
 
-        $source = (array) $input->getArgument(Option::SOURCE);
+        $source = $this->resolvesSourcePaths($input);
 
         $phpFileInfos = $this->filesFinder->findInDirectoriesAndFiles($source, $this->fileExtensions);
 
@@ -187,4 +195,20 @@ final class ProcessCommand extends AbstractCommand
 
         return Shell::CODE_SUCCESS;
     }
+
+    /**
+     * @return string[]
+     */
+    private function resolvesSourcePaths(InputInterface $input): array
+    {
+        $commandLinePaths = (array) $input->getArgument(Option::SOURCE);
+
+        // manual command line value has priority
+        if (count($commandLinePaths) > 0) {
+            return $commandLinePaths;
+        }
+
+        // fallback to config defined paths
+        return $this->paths;
+    }
 }