diff --git a/Makefile b/Makefile
index 76fa0f0..6abcae2 100644
--- a/Makefile
+++ b/Makefile
@@ -26,8 +26,8 @@
 export OPENOLT_ROOT_DIR=$(shell pwd)
 
 ## Variables
-OPENOLTDEVICE     ?= asfvolt16
-OPENOLT_PROTO_VER ?= v4.2.0
+OPENOLTDEVICE     ?= sim
+OPENOLT_PROTO_VER ?= v5.1.0
 
 DOCKER                     ?= docker
 DOCKER_REGISTRY            ?=