diff --git a/Makefile b/Makefile
index 236e796..dcf030a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 
 export FW_MAJOR := 1
-export FW_MINOR := 4
+export FW_MINOR := 5
 
 PROJ = greaseweazle-firmware
 VER := $(FW_MAJOR).$(FW_MINOR)
diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index c1dc680..91464b9 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -3,6 +3,12 @@
 ** Keir Fraser <keir.xen@gmail.com>
 ************************************
 
+** v1.5 - 19 December 2023
+ - AT32F403(A): Extend SRAM from 96kB to 224kB
+ - Report USB buffer size in 'gw info'
+ - GCC12 build fixes
+ - USB High Speed: Fix device_qualifier descriptor
+
 ** v1.4 - 22 July 2023
  - New board type: V4.1 (AT32F4xx, USB-C)