update tag to mpw-8b
diff --git a/Makefile b/Makefile
index bc049d4..be798cf 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@
 # Install lite version of caravel, (1): caravel-lite, (0): caravel
 CARAVEL_LITE?=1
 
-MPW_TAG ?= mpw-7a
+MPW_TAG ?= mpw-8b
 
 ifeq ($(CARAVEL_LITE),1)
 	CARAVEL_NAME := caravel-lite