diff --git a/firmware/inc/config.h b/firmware/inc/config.h
index 22fb6b3..cfbfd6f 100644
--- a/firmware/inc/config.h
+++ b/firmware/inc/config.h
@@ -8,7 +8,7 @@
 
 #define FW_VERSION_MAJOR (0)
 #define FW_VERSION_MINOR (1)
-#define FW_VERSION_PATCH (0)
+#define FW_VERSION_PATCH (1)
 
 
 #define HARP_CORE_LED_PIN (25)
@@ -18,7 +18,7 @@
 #define HARP_UART (uart1)
 // Baud rate and offset defined per spec.
 // https://harp-tech.org/protocol/SynchronizationClock.html
-#define HARP_SYNC_BAUDRATE (100000UL)
+#define HARP_SYNC_BAUDRATE (100'000UL)
 #define HARP_CLKOUT_PIN (4)
 #define HARP_CLKIN_PIN (5)
 #define HARP_SYNC_START_OFFSET_US (-1172) // Offset from spec to account for
@@ -37,6 +37,8 @@
                                     // minimum baud rate, or we will not have
                                     // enough time to emit a full 4-byte
                                     // (+1 start and 1 stop bit) message at 1Hz.
+#define MAX_AUX_SYNC_BAUDRATE (1'000'000UL) // Aux Baud rate should be slower
+                                            // than this value.
 #define AUX_PIN (0)
 #define AUX_SYNC_START_OFFSET_US (0) // Offset from spec to account for
                                       // transmission time.
diff --git a/firmware/src/white_rabbit_app.cpp b/firmware/src/white_rabbit_app.cpp
index cfff539..d0dcacc 100644
--- a/firmware/src/white_rabbit_app.cpp
+++ b/firmware/src/white_rabbit_app.cpp
@@ -379,7 +379,8 @@ void write_aux_baud_rate(msg_t& msg)
     uint32_t old_baud_rate = app_regs.AuxBaudRate;
     HarpCore::copy_msg_payload_to_register(msg);
     // Reject invalid baud rates.
-    if (app_regs.AuxBaudRate < MIN_AUX_SYNC_BAUDRATE)
+    if (app_regs.AuxBaudRate < MIN_AUX_SYNC_BAUDRATE ||
+        app_regs.AuxBaudRate > MAX_AUX_SYNC_BAUDRATE)
     {
         if (!HarpCore::is_muted())
             HarpCore::send_harp_reply(WRITE_ERROR, msg.header.address);
diff --git a/software/bonsai/device.yml b/software/bonsai/device.yml
index ba30945..4278ea7 100644
--- a/software/bonsai/device.yml
+++ b/software/bonsai/device.yml
@@ -3,8 +3,8 @@
 # yaml-language-server: $schema=https://raw.githubusercontent.com/harp-tech/reflex-generator/main/schema/device.json
 device: WhiteRabbit
 whoAmI: 1404
-firmwareVersion: "0.0"
-hardwareTargets: "0.0"
+firmwareVersion: "0.1"
+hardwareTargets: "0.1"
 registers:
   ConnectedDevices:
     address: 32