diff --git a/CHANGELOG.md b/CHANGELOG.md
index 06b60ae..cc4d331 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).
 
+## [0.13.1] - 2022-05-07
+- Fix mistune version for doc builds.
+
 ## [0.13.0] - 2022-05-02
 - Covergroup format revised.
 - Added support for Pseudoinstructions for coverage computation.
diff --git a/docs/requirements.txt b/docs/requirements.txt
index a4d30e1..2a1d694 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -35,5 +35,6 @@ urllib3==1.25.3
 twine==1.13.0
 sphinx_tabs
 m2r2==0.2.7
+mistune==0.8.4
 colorlog==4.1.0
 pyelftools==0.26
diff --git a/riscv_isac/__init__.py b/riscv_isac/__init__.py
index 638deb3..1916229 100644
--- a/riscv_isac/__init__.py
+++ b/riscv_isac/__init__.py
@@ -4,4 +4,4 @@
 
 __author__ = """InCore Semiconductors Pvt Ltd"""
 __email__ = 'info@incoresemi.com'
-__version__ = '0.13.0'
+__version__ = '0.13.1'
diff --git a/setup.cfg b/setup.cfg
index 7f2b805..9bd46b4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.13.0
+current_version = 0.13.1
 commit = True
 tag = True
 
diff --git a/setup.py b/setup.py
index 40acdcb..ac1c6ec 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@ def read_requires():
 
 setup(
     name='riscv_isac',
-    version='0.13.0',
+    version='0.13.1',
     description="RISC-V ISAC",
     long_description=readme + '\n\n',
     classifiers=[