diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba6df36956..98fdafb4a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+# v12.0.0b1
+
+Kubernetes API Version: 1.16.14
+
+**New Feature:**
+- Accept and use client certificates from authentication plugins [kubernetes-client/python-base#205](https://github.com/kubernetes-client/python-base/pull/205)
+
+**Bug Fix:**
+- Return when object is None in FileOrData class [kubernetes-client/python-base#201](https://github.com/kubernetes-client/python-base/pull/201)
+
 # v12.0.0a1
 
 Kubernetes API Version: 1.16.14
diff --git a/kubernetes/README.md b/kubernetes/README.md
index 1305f5814f..91b682baf4 100644
--- a/kubernetes/README.md
+++ b/kubernetes/README.md
@@ -4,7 +4,7 @@ No description provided (generated by Openapi Generator https://github.com/opena
 This Python package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: release-1.16
-- Package version: 12.0.0a1
+- Package version: 12.0.0b1
 - Build package: org.openapitools.codegen.languages.PythonClientCodegen
 
 ## Requirements.
diff --git a/kubernetes/__init__.py b/kubernetes/__init__.py
index cc1742a338..f85abe66fb 100644
--- a/kubernetes/__init__.py
+++ b/kubernetes/__init__.py
@@ -14,7 +14,7 @@
 
 __project__ = 'kubernetes'
 # The version is auto-updated. Please do not edit.
-__version__ = "12.0.0a1"
+__version__ = "12.0.0b1"
 
 import kubernetes.client
 import kubernetes.config
diff --git a/kubernetes/base b/kubernetes/base
index fb86b8acb6..54d188f89e 160000
--- a/kubernetes/base
+++ b/kubernetes/base
@@ -1 +1 @@
-Subproject commit fb86b8acb66830b098c691fa14f4e6edbf9f7317
+Subproject commit 54d188f89e462e4c829aa9acb44d5c09cc5030ae
diff --git a/kubernetes/client/__init__.py b/kubernetes/client/__init__.py
index 7d9b48d4f5..0f9102c7d7 100644
--- a/kubernetes/client/__init__.py
+++ b/kubernetes/client/__init__.py
@@ -14,7 +14,7 @@
 
 from __future__ import absolute_import
 
-__version__ = "12.0.0a1"
+__version__ = "12.0.0b1"
 
 # import apis into sdk package
 from kubernetes.client.api.admissionregistration_api import AdmissionregistrationApi
diff --git a/kubernetes/client/api_client.py b/kubernetes/client/api_client.py
index 8148693831..c47c2e6994 100644
--- a/kubernetes/client/api_client.py
+++ b/kubernetes/client/api_client.py
@@ -78,7 +78,7 @@ def __init__(self, configuration=None, header_name=None, header_value=None,
             self.default_headers[header_name] = header_value
         self.cookie = cookie
         # Set default User-Agent.
-        self.user_agent = 'OpenAPI-Generator/12.0.0a1/python'
+        self.user_agent = 'OpenAPI-Generator/12.0.0b1/python'
         self.client_side_validation = configuration.client_side_validation
 
     def __enter__(self):
diff --git a/kubernetes/client/configuration.py b/kubernetes/client/configuration.py
index e87e18f621..23f7f4b622 100644
--- a/kubernetes/client/configuration.py
+++ b/kubernetes/client/configuration.py
@@ -347,7 +347,7 @@ def to_debug_report(self):
                "OS: {env}\n"\
                "Python Version: {pyversion}\n"\
                "Version of the API: release-1.16\n"\
-               "SDK Package Version: 12.0.0a1".\
+               "SDK Package Version: 12.0.0b1".\
                format(env=sys.platform, pyversion=sys.version)
 
     def get_host_settings(self):
diff --git a/scripts/constants.py b/scripts/constants.py
index b19d171055..6cb6f23b3f 100644
--- a/scripts/constants.py
+++ b/scripts/constants.py
@@ -18,13 +18,13 @@
 KUBERNETES_BRANCH = "release-1.16"
 
 # client version for packaging and releasing.
-CLIENT_VERSION = "12.0.0a1"
+CLIENT_VERSION = "12.0.0b1"
 
 # Name of the release package
 PACKAGE_NAME = "kubernetes"
 
 # Stage of development, mainly used in setup.py's classifiers.
-DEVELOPMENT_STATUS = "3 - Alpha"
+DEVELOPMENT_STATUS = "4 - Beta"
 
 
 # If called directly, return the constant value given
diff --git a/setup.py b/setup.py
index e55c3ea76b..dbcb865535 100644
--- a/setup.py
+++ b/setup.py
@@ -16,9 +16,9 @@
 
 # Do not edit these constants. They will be updated automatically
 # by scripts/update-client.sh.
-CLIENT_VERSION = "12.0.0a1"
+CLIENT_VERSION = "12.0.0b1"
 PACKAGE_NAME = "kubernetes"
-DEVELOPMENT_STATUS = "3 - Alpha"
+DEVELOPMENT_STATUS = "4 - Beta"
 
 # To install the library, run the following
 #