diff --git a/src/fleet/HISTORY.rst b/src/fleet/HISTORY.rst
index edd685d497a..becbf2337fd 100644
--- a/src/fleet/HISTORY.rst
+++ b/src/fleet/HISTORY.rst
@@ -72,4 +72,8 @@ Release History
 
 1.0.3
 ++++++
-* Added `az fleet reconcile` & `az fleet member reconcile` commands.
\ No newline at end of file
+* Added `az fleet reconcile` & `az fleet member reconcile` commands.
+
+1.0.4
+++++++
+* Added new --upgrade-type parameter "ControlPlaneOnly" for command `az fleet updaterun create --upgrade-type`.
\ No newline at end of file
diff --git a/src/fleet/azext_fleet/_help.py b/src/fleet/azext_fleet/_help.py
index 87bf734ea59..8b7d00a00e1 100644
--- a/src/fleet/azext_fleet/_help.py
+++ b/src/fleet/azext_fleet/_help.py
@@ -181,10 +181,10 @@
     parameters:
         - name: --upgrade-type
           type: string
-          short-summary: Specify the upgrade type of members. Acceptable values are 'Full' and 'NodeImageOnly'.
+          short-summary: Specify the upgrade type of members. Acceptable values are 'Full', 'ControlPlaneOnly', and 'NodeImageOnly'.
         - name: --kubernetes-version
           type: string
-          short-summary: Specify the kubernetes version to upgrade member(s) to, when --upgrade-type is set to 'Full'. Acceptable format is x.x.x (eg. 1.2.3).
+          short-summary: Specify the kubernetes version to upgrade member(s) to, when --upgrade-type is set to 'Full' or 'ControlPlaneOnly'. Acceptable format is x.x.x (eg. 1.2.3).
         - name: --stages
           type: string
           short-summary: Path to a JSON file that defines stages to upgrade a fleet. See examples for reference.
diff --git a/src/fleet/azext_fleet/_params.py b/src/fleet/azext_fleet/_params.py
index 23c47ddef16..af8f820b43d 100644
--- a/src/fleet/azext_fleet/_params.py
+++ b/src/fleet/azext_fleet/_params.py
@@ -59,7 +59,7 @@ def load_arguments(self, _):
         c.argument('fleet_name', options_list=['--fleet-name', '-f'], help='Specify the fleet name.')
 
     with self.argument_context('fleet updaterun create') as c:
-        c.argument('upgrade_type', arg_type=get_enum_type(['Full', 'NodeImageOnly']))
+        c.argument('upgrade_type', arg_type=get_enum_type(['Full', 'NodeImageOnly', 'ControlPlaneOnly']))
         c.argument('kubernetes_version', validator=validate_kubernetes_version)
         c.argument('node_image_selection', arg_type=get_enum_type(['Latest', 'Consistent']), help='Node Image Selection is an option that lets you choose how your clusters\' nodes are upgraded')
         c.argument('stages', type=file_type, completer=FilesCompleter(), help='Path to a json file that defines stages to upgrade a fleet. See examples for further reference.')
diff --git a/src/fleet/azext_fleet/constants.py b/src/fleet/azext_fleet/constants.py
new file mode 100644
index 00000000000..0c0d3877ea8
--- /dev/null
+++ b/src/fleet/azext_fleet/constants.py
@@ -0,0 +1,14 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+
+UPGRADE_TYPE_CONTROLPLANEONLY = "ControlPlaneOnly"
+UPGRADE_TYPE_FULL = "Full"
+UPGRADE_TYPE_NODEIMAGEONLY = "NodeImageOnly"
+
+UPGRADE_TYPE_ERROR_MESSAGES = {
+    UPGRADE_TYPE_CONTROLPLANEONLY: f"Please set kubernetes version when upgrade type is '{UPGRADE_TYPE_CONTROLPLANEONLY}'.",  # pylint: disable=line-too-long
+    UPGRADE_TYPE_FULL: f"Please set kubernetes version when upgrade type is '{UPGRADE_TYPE_FULL}'.",
+    UPGRADE_TYPE_NODEIMAGEONLY: f"Cannot set kubernetes version when upgrade type is '{UPGRADE_TYPE_NODEIMAGEONLY}'."
+}
diff --git a/src/fleet/azext_fleet/custom.py b/src/fleet/azext_fleet/custom.py
index 166e71b40fc..e3e8e0a5cd8 100644
--- a/src/fleet/azext_fleet/custom.py
+++ b/src/fleet/azext_fleet/custom.py
@@ -14,6 +14,10 @@
 
 from azext_fleet._client_factory import CUSTOM_MGMT_FLEET
 from azext_fleet._helpers import print_or_merge_credentials
+from azext_fleet.constants import UPGRADE_TYPE_CONTROLPLANEONLY
+from azext_fleet.constants import UPGRADE_TYPE_FULL
+from azext_fleet.constants import UPGRADE_TYPE_NODEIMAGEONLY
+from azext_fleet.constants import UPGRADE_TYPE_ERROR_MESSAGES
 
 
 # pylint: disable=too-many-locals
@@ -316,10 +320,17 @@ def create_update_run(cmd,
                       stages=None,
                       update_strategy_name=None,
                       no_wait=False):
-    if upgrade_type == "Full" and kubernetes_version is None:
-        raise CLIError("Please set kubernetes version when upgrade type is 'Full'.")
-    if upgrade_type == "NodeImageOnly" and kubernetes_version is not None:
-        raise CLIError("Cannot set kubernetes version when upgrade type is 'NodeImageOnly'.")
+
+    if upgrade_type in UPGRADE_TYPE_ERROR_MESSAGES:
+        if (
+            ((upgrade_type in (UPGRADE_TYPE_FULL, UPGRADE_TYPE_CONTROLPLANEONLY)) and kubernetes_version is None) or  # pylint: disable=line-too-long
+            (upgrade_type == UPGRADE_TYPE_NODEIMAGEONLY and kubernetes_version is not None)
+        ):
+            raise CLIError(UPGRADE_TYPE_ERROR_MESSAGES[upgrade_type])
+    else:
+        raise CLIError((f"The upgrade type parameter '{upgrade_type}' is not valid."
+                        f"Valid options are: '{UPGRADE_TYPE_FULL}', '{UPGRADE_TYPE_CONTROLPLANEONLY}', or '{UPGRADE_TYPE_NODEIMAGEONLY}'"))  # pylint: disable=line-too-long
+
     if stages is not None and update_strategy_name is not None:
         raise CLIError("Cannot set stages when update strategy name is set.")
 
diff --git a/src/fleet/setup.py b/src/fleet/setup.py
index 98899dca7a7..7c19c452842 100644
--- a/src/fleet/setup.py
+++ b/src/fleet/setup.py
@@ -16,7 +16,7 @@
 
 # TODO: Confirm this is the right version number you want and it matches your
 # HISTORY.rst entry.
-VERSION = '1.0.3'
+VERSION = '1.0.4'
 
 # The full list of classifiers is available at
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers