diff --git a/NetworkPkg/Include/Library/HttpLib.h b/NetworkPkg/Include/Library/HttpLib.h
index f8505ab4d7..a6894d3fe3 100644
--- a/NetworkPkg/Include/Library/HttpLib.h
+++ b/NetworkPkg/Include/Library/HttpLib.h
@@ -444,6 +444,9 @@ HttpGenRequestMessage (
   Translate the status code in HTTP message to EFI_HTTP_STATUS_CODE defined
   in UEFI 2.5 specification.
 
+  The official HTTP status codes can be found here:
+  https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+
   @param[in]  StatusCode         The status code value in HTTP message.
 
   @return                        Value defined in EFI_HTTP_STATUS_CODE .
diff --git a/NetworkPkg/Library/DxeHttpLib/DxeHttpLib.c b/NetworkPkg/Library/DxeHttpLib/DxeHttpLib.c
index f1da69bbf7..edb8f580fa 100644
--- a/NetworkPkg/Library/DxeHttpLib/DxeHttpLib.c
+++ b/NetworkPkg/Library/DxeHttpLib/DxeHttpLib.c
@@ -1995,6 +1995,9 @@ Exit:
   Translate the status code in HTTP message to EFI_HTTP_STATUS_CODE defined
   in UEFI 2.5 specification.
 
+  The official HTTP status codes can be found here:
+  https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+
   @param[in]  StatusCode         The status code value in HTTP message.
 
   @return                        Value defined in EFI_HTTP_STATUS_CODE .
@@ -2077,6 +2080,8 @@ HttpMappingToStatusCode (
       return HTTP_STATUS_416_REQUESTED_RANGE_NOT_SATISFIED;
     case 417:
       return HTTP_STATUS_417_EXPECTATION_FAILED;
+    case 429:
+      return HTTP_STATUS_429_TOO_MANY_REQUESTS;
     case 500:
       return HTTP_STATUS_500_INTERNAL_SERVER_ERROR;
     case 501: