diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3f0a05..2cb7594 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.23.4] - 2022-02-24
+- fixed doc dependency on mistune for successful RTD build
+
 ## [1.23.3] - 2022-01-27
 - Added missing subextensions for B and K specs in ISA generation function.
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 74f7829..99f0ec2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -34,3 +34,4 @@ urllib3==1.25.3
 twine==1.13.0
 sphinx_tabs==2.1.0
 m2r2==0.2.7
+mistune==0.8.4
diff --git a/riscof/__init__.py b/riscof/__init__.py
index e09e9bd..9a65dea 100644
--- a/riscof/__init__.py
+++ b/riscof/__init__.py
@@ -4,4 +4,4 @@
 
 __author__ = """InCore Semiconductors Pvt Ltd"""
 __email__ = 'info@incoresemi.com'
-__version__ = '1.23.3'
+__version__ = '1.23.4'
diff --git a/setup.cfg b/setup.cfg
index be343a5..45feb34 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.23.3
+current_version = 1.23.4
 commit = True
 tag = True
 
diff --git a/setup.py b/setup.py
index 91b9f09..81a4e3e 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@ def read_requires():
 test_requirements = [ ]
 
 setup(name="riscof",
-      version='1.23.3',
+      version='1.23.4',
       description="RISC-V Architectural Test Framework",
       long_description=readme + '\n\n',
       classifiers=[