diff --git a/src/Command/RenderCommand.php b/src/Command/RenderCommand.php
index 43a739ab447e7fffd405773cad2866241bd8e420..dd16e7019fbe23d14ffe087e4e067923d12079e4 100644
--- a/src/Command/RenderCommand.php
+++ b/src/Command/RenderCommand.php
@@ -29,6 +29,7 @@ use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symfony\Component\Filesystem\Filesystem;
+use Symfony\Component\Process\ExecutableFinder;
 
 /**
  * Description of ImportAffiliationCommand.
@@ -69,7 +70,13 @@ class RenderCommand extends ContainerAwareCommand
         }
     }
 
-    protected function renderGraph(Graph $graph, $target, $format, SymfonyStyle $io)
+    /**
+     * @param Graph $graph
+     * @param $target
+     * @param $format
+     * @param SymfonyStyle $io
+     */
+    private function renderGraph(Graph $graph, $target, $format, SymfonyStyle $io): void
     {
         $io->writeln("Fichier de sortie: <comment>$target</comment>");
 
@@ -103,20 +110,28 @@ class RenderCommand extends ContainerAwareCommand
         }
     }
 
-    protected function startProcess($target, $format)
+    /**
+     * @param $target
+     * @param $format
+     * @return array
+     */
+    private function startProcess($target, $format): array
     {
+        $ctn = $this->getContainer();
+        $javaBin = $this->findExecutable($ctn->getParameter('irstea_plant_uml.binaries.java'));
+        $dotBin = $this->findExecutable($ctn->getParameter('irstea_plant_uml.binaries.dot'));
+
         $fs = new Filesystem();
         $fs->mkdir(dirname($target));
 
-        $ctn = $this->getContainer();
         $cmd = implode(
             ' ',
             [
-                $ctn->getParameter('irstea_plant_uml.binaries.java'),
+                $javaBin,
                 '-jar',
                 $ctn->getParameter('irstea_plant_uml.binaries.plamtuml_jar'),
                 '-graphvizdot',
-                $ctn->getParameter('irstea_plant_uml.binaries.dot'),
+                $dotBin,
                 '-pipe',
                 '-t' . $format,
             ]
@@ -136,4 +151,21 @@ class RenderCommand extends ContainerAwareCommand
 
         return [$proc, $pipes];
     }
+
+    /**
+     * @param string $nameOrPath
+     * @return string
+     */
+    private function findExecutable(string $nameOrPath): string
+    {
+        if (\file_exists($nameOrPath) && \is_executable($nameOrPath)) {
+            return $nameOrPath;
+        }
+        $exec = new ExecutableFinder();
+        $path = $exec->find($nameOrPath);
+        if ($path === null) {
+            throw new \RuntimeException("cannot find executable: $nameOrPath");
+        }
+        return $path;
+    }
 }