diff --git a/automotive/vehicle/2.1/default/service.cpp b/automotive/vehicle/2.1/default/service.cpp
index bae64fd..03a0a5d 100644
--- a/automotive/vehicle/2.1/default/service.cpp
+++ b/automotive/vehicle/2.1/default/service.cpp
@@ -88,7 +88,7 @@
 
     Vehicle_V2_1 vehicle21(vehicleManager.get());
 
-    configureRpcThreadpool(1, true /* callerWillJoin */);
+    configureRpcThreadpool(4, true /* callerWillJoin */);
 
     ALOGI("Registering as service...");
     status_t status = vehicle21.registerAsService();