diff --git a/Makefile b/Makefile
index 1b60d492..949b5a20 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,7 @@ MPW_TAG ?= 2024.09.12-1
 PYTHON_BIN ?= python3
 
 # PDK switch varient
-export PDK?=sky130A
+export PDK?=sky130B
 
 # Install lite version of caravel, (1): caravel-lite, (0): caravel
 MCW_LITE?=1