diff --git a/src/main/scala/unleashed/u500ml507devkit/Config.scala b/src/main/scala/unleashed/u500ml507devkit/Config.scala
index e88d64b..dc6fb02 100644
--- a/src/main/scala/unleashed/u500ml507devkit/Config.scala
+++ b/src/main/scala/unleashed/u500ml507devkit/Config.scala
@@ -19,7 +19,7 @@ import sifive.freedom.unleashed.u500ml507devkit.fpga._
 class FreedomUML507Config extends Config(
   new WithJtagDTM            ++
   new WithNMemoryChannels(1) ++
-  new WithNBigCores(4)       ++
+  new WithNBigCores(1)       ++
   new BaseConfig
 )