diff --git a/phpstan.dist.neon b/phpstan.dist.neon
index fa5eb79..746569b 100644
--- a/phpstan.dist.neon
+++ b/phpstan.dist.neon
@@ -7,6 +7,8 @@ parameters:
     paths:
         - src
     tmpDir: var/phpstan
+    parallel:
+        maximumNumberOfProcesses: 1
     symfony:
         containerXmlPath: var/cache/dev/App_KernelDevDebugContainer.xml
     doctrine: