diff --git a/rector.php b/rector.php
index 672403ab..7b534e37 100644
--- a/rector.php
+++ b/rector.php
@@ -3,7 +3,9 @@
 declare(strict_types=1);
 
 use Rector\CodeQuality\Rector\Class_\InlineConstructorDefaultToPropertyRector;
+use Rector\CodingStyle\Rector\String_\UseClassKeywordForClassNameResolutionRector;
 use Rector\Config\RectorConfig;
+use Rector\Php55\Rector\String_\StringClassNameToClassConstantRector;
 use Rector\Set\ValueObject\LevelSetList;
 use Rector\PHPUnit\Set\PHPUnitLevelSetList;
 use Rector\Symfony\Set\SymfonyLevelSetList;
@@ -20,4 +22,13 @@
         PHPUnitLevelSetList::UP_TO_PHPUNIT_100,
         SymfonyLevelSetList::UP_TO_SYMFONY_60,
     ]);
+
+    $rectorConfig->skip([StringClassNameToClassConstantRector::class => [
+        __DIR__ . '/src/Plugin/Filtering/Builder/Drop.php',
+        __DIR__ . '/src/Plugin/Filtering/Builder/Reject.php',
+        __DIR__ . '/src/Plugin/SFTP/Builder/Extractor.php',
+        __DIR__ . '/src/Plugin/SFTP/Builder/Loader.php',
+        __DIR__ . '/src/Plugin/Batching/Builder/Fork.php',
+        __DIR__ . '/src/Plugin/Batching/Builder/Merge.php',
+    ]]);
 };
diff --git a/src/Action/SFTP/Builder/Action.php b/src/Action/SFTP/Builder/Action.php
index c20bc4d8..98aba4de 100644
--- a/src/Action/SFTP/Builder/Action.php
+++ b/src/Action/SFTP/Builder/Action.php
@@ -37,7 +37,7 @@ public function withState(Node\Expr $state): self
     public function getNode(): Node
     {
         return new Node\Expr\New_(
-            class: new Node\Name\FullyQualified('Kiboko\Component\Action\Flow\SFTP\UploadFile'),
+            class: new Node\Name\FullyQualified('Kiboko\\Component\\Action\\Flow\\SFTP\\UploadFile'),
             args: [
                 new Node\Arg(
                     value: $this->host,
diff --git a/src/Builder/Workflow.php b/src/Builder/Workflow.php
index 3ca024b5..6d868baf 100644
--- a/src/Builder/Workflow.php
+++ b/src/Builder/Workflow.php
@@ -23,7 +23,7 @@ public function addPipeline(string $code, string $pipelineFilename): self
             args: [
                 new Node\Arg(
                     new Node\Expr\StaticCall(
-                        new Node\Name\FullyQualified('Kiboko\Component\Workflow\JobCode'),
+                        new Node\Name\FullyQualified('Kiboko\\Component\\Workflow\\JobCode'),
                         new Node\Identifier('fromString'),
                         [
                             new Node\Arg(new Node\Scalar\String_($code)),
@@ -37,7 +37,7 @@ public function addPipeline(string $code, string $pipelineFilename): self
                         args: [
                             new Node\Arg(
                                 new Node\Expr\StaticCall(
-                                    new Node\Name\FullyQualified('Kiboko\Component\Workflow\JobCode'),
+                                    new Node\Name\FullyQualified('Kiboko\\Component\\Workflow\\JobCode'),
                                     new Node\Identifier('fromString'),
                                     [
                                         new Node\Arg(new Node\Scalar\String_($code)),
@@ -72,7 +72,7 @@ public function addAction(string $code, string $pipelineFilename): self
             args: [
                 new Node\Arg(
                     new Node\Expr\StaticCall(
-                        new Node\Name\FullyQualified('Kiboko\Component\Workflow\JobCode'),
+                        new Node\Name\FullyQualified('Kiboko\\Component\\Workflow\\JobCode'),
                         new Node\Identifier('fromString'),
                         [
                             new Node\Arg(new Node\Scalar\String_($code)),
@@ -86,7 +86,7 @@ public function addAction(string $code, string $pipelineFilename): self
                         args: [
                             new Node\Arg(
                                 new Node\Expr\StaticCall(
-                                    new Node\Name\FullyQualified('Kiboko\Component\Workflow\JobCode'),
+                                    new Node\Name\FullyQualified('Kiboko\\Component\\Workflow\\JobCode'),
                                     new Node\Identifier('fromString'),
                                     [
                                         new Node\Arg(new Node\Scalar\String_($code)),
diff --git a/src/Builder/Workflow/WorkflowRuntime.php b/src/Builder/Workflow/WorkflowRuntime.php
index 890032ff..5100c839 100644
--- a/src/Builder/Workflow/WorkflowRuntime.php
+++ b/src/Builder/Workflow/WorkflowRuntime.php
@@ -12,7 +12,7 @@ final class WorkflowRuntime implements Builder
     public function getNode(): Node\Expr
     {
         return new Node\Expr\New_(
-            class: new Node\Name\FullyQualified('Kiboko\Component\Runtime\Workflow\Console'),
+            class: new Node\Name\FullyQualified('Kiboko\\Component\\Runtime\\Workflow\\Console'),
             args: [
                 new Node\Arg(
                     value: new Node\Expr\New_(
@@ -21,7 +21,7 @@ class: new Node\Name\FullyQualified(\Symfony\Component\Console\Output\ConsoleOut
                 ),
                 new Node\Arg(
                     new Node\Expr\New_(
-                        class: new Node\Name\FullyQualified('Kiboko\Component\Pipeline\PipelineRunner'),
+                        class: new Node\Name\FullyQualified('Kiboko\\Component\\Pipeline\\PipelineRunner'),
                         args: [
                             new Node\Arg(
                                 value: new Node\Expr\New_(
diff --git a/src/Plugin/Batching/Service.php b/src/Plugin/Batching/Service.php
index e8f86bdb..1c997c4d 100644
--- a/src/Plugin/Batching/Service.php
+++ b/src/Plugin/Batching/Service.php
@@ -4,7 +4,6 @@
 
 namespace Kiboko\Component\Satellite\Plugin\Batching;
 
-// FIXME: hidden dependency to php-etl/fast-map
 use Kiboko\Component\SatelliteToolbox\Builder\PropertyPathBuilder;
 use Kiboko\Component\Satellite\ExpressionLanguage as Satellite;
 use Kiboko\Component\Satellite\Plugin\Batching\Builder\Fork;