diff --git a/platformio.ini b/platformio.ini
index 9797748..7828029 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -194,7 +194,7 @@ monitor_speed = 115200
 monitor_echo = yes
 
 [env:Nucleo-F411RE]
-platform = ststm32 @ 17.6.0
+platform = ststm32 @ 19.0.0
 board = nucleo_f411re
 framework = arduino
 lib_deps = ${env.lib_deps}
@@ -203,7 +203,7 @@ monitor_speed = 115200
 monitor_echo = yes
 
 [env:Nucleo-F446RE]
-platform = ststm32 @ 17.6.0
+platform = ststm32 @ 19.0.0
 board = nucleo_f446re
 framework = arduino
 lib_deps = ${env.lib_deps}
@@ -215,7 +215,7 @@ monitor_echo = yes
 ; tested as yet
 ;
 [env:Nucleo-F401RE]
-platform = ststm32 @ 17.6.0
+platform = ststm32 @ 19.0.0
 board = nucleo_f401re
 framework = arduino
 lib_deps = ${env.lib_deps}
@@ -228,7 +228,7 @@ monitor_echo = yes
 ; installed before you can let PlatformIO see this
 ;
 ; [env:Nucleo-F413ZH]
-; platform = ststm32 @ 17.6.0
+; platform = ststm32 @ 19.0.0
 ; board = nucleo_f413zh
 ; framework = arduino
 ; lib_deps = ${env.lib_deps}
@@ -240,7 +240,7 @@ monitor_echo = yes
 ; installed before you can let PlatformIO see this
 ;
 [env:Nucleo-F446ZE]
-platform = ststm32 @ 17.6.0
+platform = ststm32 @ 19.0.0
 board = nucleo_f446ze
 framework = arduino
 lib_deps = ${env.lib_deps}
@@ -252,7 +252,7 @@ monitor_echo = yes
 ; installed before you can let PlatformIO see this
 ;
 ; [env:Nucleo-F412ZG]
-; platform = ststm32 @ 17.6.0
+; platform = ststm32 @ 19.0.0
 ; board = nucleo_f412zg
 ; framework = arduino
 ; lib_deps = ${env.lib_deps}
@@ -264,7 +264,7 @@ monitor_echo = yes
 ; Experimental - Ethernet work still in progress
 ;
 [env:Nucleo-F429ZI]
-platform = ststm32 @ 17.6.0
+platform = ststm32 @ 19.0.0
 board = nucleo_f429zi
 framework = arduino
 lib_deps = ${env.lib_deps}
@@ -284,7 +284,7 @@ upload_protocol = stlink
 ; Experimental - Ethernet work still in progress
 ;
 [env:Nucleo-F439ZI]
-platform = ststm32 @ 17.6.0
+platform = ststm32 @ 19.0.0
 ; board = nucleo_f439zi
 ; Temporarily treat it as an F429ZI (they are code compatible) until
 ; the PR to PlatformIO to update the F439ZI JSON file is available
diff --git a/version.h b/version.h
index ea1326d..372491e 100644
--- a/version.h
+++ b/version.h
@@ -3,7 +3,8 @@
 
 #include "StringFormatter.h"
 
-#define VERSION "5.5.12"
+#define VERSION "5.5.13"
+// 5.5.13 - Update STM32duino core to v19.0.0. for updated PeripheralPins.c in preparation for F429/439ZI Ethernet support 
 // 5.5.12 - Websocket support (wifi only) 
 // 5.5.11 - (5.4.2) accessory command reverse
 // 5.5.10 - CamParser fix