diff --git a/.travis.yml b/.travis.yml
index 5674ee2..d84137a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,6 @@ cache:
 
 before_script:
   - composer self-update
-  - composer update --prefer-source
 
 script:
     - ./bin/phpspec run
diff --git a/spec/CouplingDetectorSpec.php b/spec/CouplingDetectorSpec.php
index 2f497c4..7b9b6e0 100644
--- a/spec/CouplingDetectorSpec.php
+++ b/spec/CouplingDetectorSpec.php
@@ -6,6 +6,7 @@
 use Akeneo\CouplingDetector\Domain\RuleInterface;
 use Akeneo\CouplingDetector\Domain\ViolationInterface;
 use Akeneo\CouplingDetector\Event\Events;
+use Akeneo\CouplingDetector\NodeParser\ExtractionException;
 use Akeneo\CouplingDetector\NodeParser\NodeParserInterface;
 use Akeneo\CouplingDetector\NodeParser\NodeParserResolver;
 use Akeneo\CouplingDetector\RuleChecker;
@@ -17,28 +18,28 @@
 class CouplingDetectorSpec extends ObjectBehavior
 {
     function let(
-        NodeParserResolver $nodeExtractorResolver,
+        NodeParserResolver $nodeParserResolver,
         RuleChecker $ruleChecker,
         EventDispatcherInterface $eventDispatcher
     ) {
-        $this->beConstructedWith($nodeExtractorResolver, $ruleChecker, $eventDispatcher);
+        $this->beConstructedWith($nodeParserResolver, $ruleChecker, $eventDispatcher);
     }
 
     function it_detects_the_violations_of_files(
         $ruleChecker,
-        $nodeExtractorResolver,
+        $nodeParserResolver,
         $eventDispatcher,
         NodeInterface $node,
         ViolationInterface $violation,
         Finder $finder,
         RuleInterface $rule1,
         RuleInterface $rule2,
-        NodeParserInterface $extractor
+        NodeParserInterface $parser
     ) {
         $file = new \SplFileObject(__FILE__);
         $finder->getIterator()->willReturn(new \ArrayIterator(array($file)));
-        $nodeExtractorResolver->resolve(Argument::any())->willReturn($extractor);
-        $extractor->parse($file)->willReturn($node);
+        $nodeParserResolver->resolve(Argument::any())->willReturn($parser);
+        $parser->parse($file)->willReturn($node);
 
         $ruleChecker->check($rule1, $node)->willReturn(null);
         $ruleChecker->check($rule2, $node)->willReturn($violation);
@@ -56,4 +57,26 @@ function it_detects_the_violations_of_files(
         $violations->shouldBeArray();
         $violations[0]->shouldBeAnInstanceOf('Akeneo\CouplingDetector\Domain\ViolationInterface');
     }
+
+    function it_ignores_invalid_nodes(
+        $nodeParserResolver,
+        $eventDispatcher,
+        Finder $finder,
+        NodeParserInterface $parser
+    ) {
+        $file = new \SplFileObject(__DIR__.'/fixtures/InvalidNode.php');
+        $finder->getIterator()->willReturn(new \ArrayIterator([$file]));
+        $nodeParserResolver->resolve(Argument::any())->willReturn($parser);
+        $parser->parse(Argument::any())->willThrow(ExtractionException::class);
+
+        $eventDispatcher->dispatch(Events::PRE_NODES_PARSED, Argument::type('Akeneo\CouplingDetector\Event\PreNodesParsedEvent'))->shouldBeCalled();
+        $eventDispatcher->dispatch(Events::NODE_PARSED, Argument::type('Akeneo\CouplingDetector\Event\NodeParsedEvent'))->shouldNotBeCalled();
+        $eventDispatcher->dispatch(Events::POST_NODES_PARSED, Argument::type('Akeneo\CouplingDetector\Event\PostNodesParsedEvent'))->shouldBeCalled();
+        $eventDispatcher->dispatch(Events::PRE_RULES_CHECKED, Argument::type('Akeneo\CouplingDetector\Event\PreRulesCheckedEvent'))->shouldBeCalled();
+        $eventDispatcher->dispatch(Events::POST_RULES_CHECKED, Argument::type('Akeneo\CouplingDetector\Event\PostRulesCheckedEvent'))->shouldBeCalled();
+
+        $violations = $this->detect($finder, []);
+        $violations->shouldHaveCount(0);
+        $violations->shouldBeArray();
+    }
 }
diff --git a/spec/fixtures/InvalidNode.php b/spec/fixtures/InvalidNode.php
new file mode 100644
index 0000000..e69de29
diff --git a/src/CouplingDetector.php b/src/CouplingDetector.php
index bed36a2..f675a47 100644
--- a/src/CouplingDetector.php
+++ b/src/CouplingDetector.php
@@ -15,6 +15,7 @@
 use Akeneo\CouplingDetector\Event\PreRulesCheckedEvent;
 use Akeneo\CouplingDetector\Event\RuleCheckedEvent;
 use Akeneo\CouplingDetector\Event\PostRulesCheckedEvent;
+use Akeneo\CouplingDetector\NodeParser\ExtractionException;
 use Akeneo\CouplingDetector\NodeParser\NodeParserResolver;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\Finder\Finder;
@@ -111,9 +112,14 @@ private function parseNodes(Finder $finder): array
         foreach ($finder as $file) {
             $parser = $this->nodeParserResolver->resolve($file);
             if (null !== $parser) {
-                $node = $parser->parse($file);
-                $nodes[] = $node;
-                $this->eventDispatcher->dispatch(Events::NODE_PARSED, new NodeParsedEvent($node));
+                try {
+                    $node = $parser->parse($file);
+                    $nodes[] = $node;
+                    $this->eventDispatcher->dispatch(Events::NODE_PARSED, new NodeParsedEvent($node));
+                } catch (ExtractionException $e) {
+                    // at the moment, let's just ignore invalid node
+                    // need to fix that with a better design
+                }
             }
         }
 
diff --git a/src/NodeParser/PhpClassNodeParser.php b/src/NodeParser/PhpClassNodeParser.php
index b632e40..f13660f 100644
--- a/src/NodeParser/PhpClassNodeParser.php
+++ b/src/NodeParser/PhpClassNodeParser.php
@@ -42,8 +42,14 @@ public function parse(\SplFileInfo $file): NodeInterface
         }
 
         $tokens = Tokens::fromCode($content);
-        $classNamespace = $namespaceExtractor->extract($tokens);
-        $className = $classNameExtractor->extract($tokens);
+        try {
+            $classNamespace = $namespaceExtractor->extract($tokens);
+            $className = $classNameExtractor->extract($tokens);
+        } catch (ExtractionException $e) {
+            throw new ExtractionException(
+                'File is not a class file, ignoring.', $e->getCode(), $e
+            );
+        }
         $classFullName = sprintf('%s\%s', $classNamespace, $className);
         $useDeclarations = $useDeclarationExtractor->extract($tokens);