diff --git a/IDE/XilinxSDK/README.md b/IDE/XilinxSDK/README.md
index cbb61ca1b..297adfe64 100644
--- a/IDE/XilinxSDK/README.md
+++ b/IDE/XilinxSDK/README.md
@@ -215,7 +215,7 @@ WOLFSSL_XMSS_VERIFY_ONLY
 WOLFSSL_XMSS_MAX_HEIGHT=32
 WOLFBOOT_SHA_BLOCK_SIZE=4096
 IMAGE_SIGNATURE_SIZE=2500
-IMAGE_HEADER_SIZE=4096
+IMAGE_HEADER_SIZE=5000
 ```
 
 2) Create and sign image: