diff --git a/documents/iot-ethernet-out-of-box-guide.md b/documents/iot-ethernet-out-of-box-guide.md
index 368059e..bb3a919 100755
--- a/documents/iot-ethernet-out-of-box-guide.md
+++ b/documents/iot-ethernet-out-of-box-guide.md
@@ -154,7 +154,7 @@ You will receive the following back that you will need to add to the firmware in
   - You will need to attached this policy to a principal to allow the cert the rights to publish and subscribe to topics:
 
     ```
-    aws iot attach-principal-policy --principal-arn '<certificate-arn>' --policy-name 'MQTTandShadowPolicy'
+    aws iot attach-principal-policy --principal '<certificate-arn>' --policy-name 'MQTTandShadowPolicy'
     ```
 - Create a thing shadow based on the MAC address of the board:
 
diff --git a/software/aws-iot-ethernet/firmware/src/app.c b/software/aws-iot-ethernet/firmware/src/app.c
index b1a3c44..dbfe3b6 100644
--- a/software/aws-iot-ethernet/firmware/src/app.c
+++ b/software/aws-iot-ethernet/firmware/src/app.c
@@ -85,7 +85,7 @@ APP_DATA appData;
 extern APP1_DATA app1Data;
 
 #define APP_HARDWARE  "iot_ethernet_dm990004"
-#define APP_FIRMWARE_VERSION "1.2.0"
+#define APP_FIRMWARE_VERSION "1.2.1"
 
 char topic_awsUpdate[128];
 char topic_awsUpdateDelta[128];