diff --git a/doc/python/sphinx/conf.py b/doc/python/sphinx/conf.py
index 49e5ecb1dcd..c30204b51ff 100644
--- a/doc/python/sphinx/conf.py
+++ b/doc/python/sphinx/conf.py
@@ -28,13 +28,17 @@ sys.path.insert(0, os.path.join(PYTHON_FOLDER, 'grpcio_testing'))
 # -- Project information -----------------------------------------------------
 
 project = 'gRPC Python'
-copyright = '2018, The gRPC Authors'
+copyright = '2020, The gRPC Authors'
 author = 'The gRPC Authors'
 
 # Import generated grpc_version after the path been modified
 import grpc_version
-version = ".".join(grpc_version.VERSION.split(".")[:3])
+version = '.'.join(grpc_version.VERSION.split('.')[:3])
 release = grpc_version.VERSION
+if 'dev' in grpc_version.VERSION:
+    branch = 'master'
+else:
+    branch = 'v%s.%s.x' % tuple(grpc_version.VERSION.split('.')[:2])
 
 # -- General configuration ---------------------------------------------------
 
@@ -54,6 +58,7 @@ extensions = [
     'sphinx.ext.napoleon',
     'sphinx.ext.coverage',
     'sphinx.ext.autodoc.typehints',
+    'sphinx.ext.extlinks',
 ]
 
 napoleon_google_docstring = True
@@ -100,3 +105,7 @@ epub_exclude_files = ['search.html']
 # -- Options for todo extension ----------------------------------------------
 
 todo_include_todos = True
+
+# -- Options for substitutions -----------------------------------------------
+
+rst_epilog = '.. |grpc_types_link| replace:: https://github.com/grpc/grpc/blob/%s/include/grpc/impl/codegen/grpc_types.h' % branch
diff --git a/doc/python/sphinx/glossary.rst b/doc/python/sphinx/glossary.rst
index c96c9bba1ad..951eba728a3 100644
--- a/doc/python/sphinx/glossary.rst
+++ b/doc/python/sphinx/glossary.rst
@@ -44,7 +44,6 @@ Glossary
     A list of key-value pairs to configure the underlying gRPC Core channel or
     server object. Channel arguments are meant for advanced usages. Full list
     channel arguments can be found under the "grpc_arg_keys" section of
-    `grpc_types.h
-    <https://github.com/grpc/grpc/blob/master/include/grpc/impl/codegen/grpc_types.h>`_
-    header file. For example, if you want to disable TCP port reuse, you may
-    construct channel arguments like: ``options = (('grpc.so_reuseport', 0),)``.
+    "grpc_types.h" header file (|grpc_types_link|). For example, if you want to disable TCP port
+    reuse, you may construct channel arguments like: ``options =
+    (('grpc.so_reuseport', 0),)``.