diff --git a/src/spring/HISTORY.md b/src/spring/HISTORY.md
index 91a19836902..0c23958882e 100644
--- a/src/spring/HISTORY.md
+++ b/src/spring/HISTORY.md
@@ -1,5 +1,9 @@
 Release History
 ===============
+1.6.8
+---
+* Add detail description to Default for argument `--backend-protocol`.
+
 1.6.7
 ---
 * Change all Azure Spring Apps API version to 2022-11-01-preview.
diff --git a/src/spring/azext_spring/_params.py b/src/spring/azext_spring/_params.py
index 08fc64bee7f..c329fd14741 100644
--- a/src/spring/azext_spring/_params.py
+++ b/src/spring/azext_spring/_params.py
@@ -399,7 +399,7 @@ def prepare_logs_argument(c):
                        validator=validate_ingress_session_max_age)
             c.argument('backend_protocol',
                        arg_type=get_enum_type(BackendProtocol),
-                       help='Ingress backend protocol of app.')
+                       help='Ingress backend protocol of app. Default means HTTP/HTTPS/WebSocket.')
             c.argument('client_auth_certs',
                        validator=validate_ingress_client_auth_certificates,
                        help="A space-separated string containing resource ids of certificates for client authentication. e.g: --client_auth_certs='id0 id1'. Use '' to clear existing certificates.")
diff --git a/src/spring/azext_spring/vendored_sdks/appplatform/v2022_09_01_preview/models/_models_py3.py b/src/spring/azext_spring/vendored_sdks/appplatform/v2022_09_01_preview/models/_models_py3.py
index bc188429ceb..e39e8939603 100644
--- a/src/spring/azext_spring/vendored_sdks/appplatform/v2022_09_01_preview/models/_models_py3.py
+++ b/src/spring/azext_spring/vendored_sdks/appplatform/v2022_09_01_preview/models/_models_py3.py
@@ -4844,7 +4844,7 @@ class IngressSettings(_serialization.Model):
     :ivar session_cookie_max_age: Time in seconds until the cookie expires.
     :vartype session_cookie_max_age: int
     :ivar backend_protocol: How ingress should communicate with this app backend service. Known
-     values are: "GRPC" and "Default".
+     values are: "GRPC" and "Default", Default means HTTP/HTTPS/WebSocket.
     :vartype backend_protocol: str or
      ~azure.mgmt.appplatform.v2022_09_01_preview.models.BackendProtocol
     :ivar client_auth: Client-Certification Authentication.
@@ -4884,7 +4884,7 @@ def __init__(
         :keyword session_cookie_max_age: Time in seconds until the cookie expires.
         :paramtype session_cookie_max_age: int
         :keyword backend_protocol: How ingress should communicate with this app backend service. Known
-         values are: "GRPC" and "Default".
+         values are: "GRPC" and "Default", Default means HTTP/HTTPS/WebSocket.
         :paramtype backend_protocol: str or
          ~azure.mgmt.appplatform.v2022_09_01_preview.models.BackendProtocol
         :keyword client_auth: Client-Certification Authentication.
diff --git a/src/spring/azext_spring/vendored_sdks/appplatform/v2022_11_01_preview/models/_models_py3.py b/src/spring/azext_spring/vendored_sdks/appplatform/v2022_11_01_preview/models/_models_py3.py
index 53f8307bf0f..56ad2d203e9 100644
--- a/src/spring/azext_spring/vendored_sdks/appplatform/v2022_11_01_preview/models/_models_py3.py
+++ b/src/spring/azext_spring/vendored_sdks/appplatform/v2022_11_01_preview/models/_models_py3.py
@@ -6113,7 +6113,7 @@ class IngressSettings(_serialization.Model):
     :ivar session_cookie_max_age: Time in seconds until the cookie expires.
     :vartype session_cookie_max_age: int
     :ivar backend_protocol: How ingress should communicate with this app backend service. Known
-     values are: "GRPC" and "Default".
+     values are: "GRPC" and "Default", Default means HTTP/HTTPS/WebSocket.
     :vartype backend_protocol: str or
      ~azure.mgmt.appplatform.v2022_11_01_preview.models.BackendProtocol
     :ivar client_auth: Client-Certification Authentication.
@@ -6153,7 +6153,7 @@ def __init__(
         :keyword session_cookie_max_age: Time in seconds until the cookie expires.
         :paramtype session_cookie_max_age: int
         :keyword backend_protocol: How ingress should communicate with this app backend service. Known
-         values are: "GRPC" and "Default".
+         values are: "GRPC" and "Default", Default means HTTP/HTTPS/WebSocket.
         :paramtype backend_protocol: str or
          ~azure.mgmt.appplatform.v2022_11_01_preview.models.BackendProtocol
         :keyword client_auth: Client-Certification Authentication.
diff --git a/src/spring/setup.py b/src/spring/setup.py
index b109b71803a..b1d7bbf51c2 100644
--- a/src/spring/setup.py
+++ b/src/spring/setup.py
@@ -16,7 +16,7 @@
 
 # TODO: Confirm this is the right version number you want and it matches your
 # HISTORY.rst entry.
-VERSION = '1.6.7'
+VERSION = '1.6.8'
 
 # The full list of classifiers is available at
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers