diff --git a/Makefile b/Makefile
index 4d9a385..9550ba1 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ include $(DEVKITARM)/base_rules
 IPL_LOAD_ADDR := 0x40003000
 LPVERSION_MAJOR := 0
 LPVERSION_MINOR := 4
-LPVERSION_BUGFX := 0
+LPVERSION_BUGFX := 1
 
 ################################################################################
 
diff --git a/source/hos/pkg1.c b/source/hos/pkg1.c
index 5e36e05..2005db1 100644
--- a/source/hos/pkg1.c
+++ b/source/hos/pkg1.c
@@ -36,6 +36,7 @@ static const pkg1_id_t _pkg1_ids[] = {
 	{ "20190314172056", 7 }, //8.0.0
 	{ "20190531152432", 8 }, //8.1.0
 	{ "20190809135709", 9 }, //9.0.0
+	{ "20191021113848", 10 }, //9.1.0
 	{ NULL } //End.
 };
 
diff --git a/source/utils/types.h b/source/utils/types.h
index e5dcb22..ab6f35b 100644
--- a/source/utils/types.h
+++ b/source/utils/types.h
@@ -36,7 +36,8 @@
 #define KB_FIRMWARE_VERSION_700 7
 #define KB_FIRMWARE_VERSION_810 8
 #define KB_FIRMWARE_VERSION_900 9
-#define KB_FIRMWARE_VERSION_MAX KB_FIRMWARE_VERSION_900
+#define KB_FIRMWARE_VERSION_910 10
+#define KB_FIRMWARE_VERSION_MAX KB_FIRMWARE_VERSION_910
 
 #define HOS_PKG11_MAGIC 0x31314B50