Update Makefile

diff --git a/Makefile b/Makefile
index d6b1b57..71e0b8c 100644
--- a/Makefile
+++ b/Makefile

@@ -23,7 +23,7 @@
 export SKYWATER_COMMIT=c094b6e83a4f9298e47f696ec5a7fd53535ec5eb
 export OPEN_PDKS_COMMIT?=7519dfb04400f224f140749cda44ee7de6f5e095
 export PDK_MAGIC_COMMIT=7d601628e4e05fd17fcb80c3552dacb64e9f6e7b
-export OPENLANE_TAG=mpw-6b
+export OPENLANE_TAG=2022.04.08_02.45.18
 
 # Install lite version of caravel, (1): caravel-lite, (0): caravel
 CARAVEL_LITE?=1