diff --git a/phpstan.neon b/phpstan.neon
index d111b1c05f7a..2372c3d259ae 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -4,7 +4,7 @@ includes:
 parameters:
     treatPhpDocTypesAsCertain: false
     parallel:
-        jobSize: 20
+        jobSize: 10
         maximumNumberOfProcesses: 1
         processTimeout: 60.0
     ignoreErrors: