diff --git a/Makefile b/Makefile
index 5bac4fbf..a45f62d9 100644
--- a/Makefile
+++ b/Makefile
@@ -82,7 +82,7 @@ SPECIAL_VOLTAGE_LIBRARY ?= sky130_fd_sc_hvl
 IO_LIBRARY ?= sky130_fd_io
 PRIMITIVES_LIBRARY ?= sky130_fd_pr
 SKYWATER_COMMIT ?= c094b6e83a4f9298e47f696ec5a7fd53535ec5eb
-OPEN_PDKS_COMMIT ?= 1.0.255
+OPEN_PDKS_COMMIT ?= 1.0.264
 INSTALL_SRAM ?= no   #   = yes to enable
 
 .DEFAULT_GOAL := ship