diff --git a/docs/conf.py b/docs/conf.py
index c3a421c..f1c62cf 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -70,7 +70,7 @@
 # The short X.Y version.
 version = "0.6"
 # The full version, including alpha/beta/rc tags.
-release = "0.6.0"
+release = "0.6.0-dev.1+pr.97"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/releasehistory.rst b/docs/releasehistory.rst
index 7eb7c5d..e59e2a6 100644
--- a/docs/releasehistory.rst
+++ b/docs/releasehistory.rst
@@ -2,12 +2,16 @@
 Release History
 ***************
 
+Version 0.6.1-dev
+===================================
+- Fixed some dead links in the documentation (0.6.1-dev.1+pr.97)
+
 Version 0.6.0 (Mar 10, 2020)
 ===================================
 - Re-designed the API of :py:mod:`adtk.visualization.plot`
 - Removed :py:mod:`adtk.data.resample` because its functionality is highly overlapped with pandas resampler module
-- Made :py:mod:`adtk.data.expand_event` accept events in the form of pandas Series/DataFrame
-- Made :py:mod:`adtk.data.expand_event` accept time delta in the form of `str` or `int`
+- Made :py:mod:`adtk.data.expand_events` accept events in the form of pandas Series/DataFrame
+- Made :py:mod:`adtk.data.expand_events` accept time delta in the form of `str` or `int`
 - Changed the output type of :py:mod:`adtk.data.split_train_test` from a 2-tuple of lists to a list of 2-tuples
 - Turned the following model parameters required from optional
 
diff --git a/setup.cfg b/setup.cfg
index ac720db..7e48c30 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = adtk
-version = 0.6.0
+version = 0.6.1-dev.1+pr.97
 author = Arundo Analytics, Inc.
 maintainer = Tailai Wen
 maintainer_email = tailai.wen@arundo.com
diff --git a/src/adtk/__init__.py b/src/adtk/__init__.py
index 99424dd..efd5e1a 100644
--- a/src/adtk/__init__.py
+++ b/src/adtk/__init__.py
@@ -20,4 +20,4 @@
 
 """
 
-__version__ = "0.6.0"
+__version__ = "0.6.0-dev.1+pr.97"