diff --git a/src/Executor.php b/src/Executor.php
index 365238a..030b1e4 100644
--- a/src/Executor.php
+++ b/src/Executor.php
@@ -16,7 +16,7 @@ public function execute(Filename $commandFilename, $argLine) {
 
         $executable = sprintf(
             '%s %s',
-            escapeshellarg($commandFilename->asString()),
+            escapeshellcmd($commandFilename->asString()),
             $argLine
         );
         exec($executable, $output, $rc);