diff --git a/docs/about/release-notes.md b/docs/about/release-notes.md
index f2bc75b..1437963 100644
--- a/docs/about/release-notes.md
+++ b/docs/about/release-notes.md
@@ -14,11 +14,15 @@ You can check your currently installed version using `pheasant --version`:
 
 ~~~bash terminal
 $ pheasant --version
-pheasant, version 2.5.2 from /path/to/pheasant (Python 3.7)
+pheasant, version 2.5.3 from /path/to/pheasant (Python 3.7)
 ~~~
 
 ## Change log
 
+### Version 2.5.3 (2020-05-19)
+
+* Docstring like `"""markdown` or `"""md` is converted into Markdown in python file.
+
 ### Version 2.5.2 (2020-05-11)
 
 * Default behavior changed: Now, header numbering doesn't occur unless users set it explicitly. To enable numbering, in mkdocs.yaml:
diff --git a/pheasant/__init__.py b/pheasant/__init__.py
index 667b52f..43b48b6 100644
--- a/pheasant/__init__.py
+++ b/pheasant/__init__.py
@@ -1 +1 @@
-__version__ = "2.5.2"
+__version__ = "2.5.3"