diff --git a/CHANGELOG.md b/CHANGELOG.md
index e148df9..af28628 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,11 +3,21 @@
 ## [Unreleased]
 
 
+<a name="0.3.1"></a>
+## [0.3.1] - 2021-01-30
+### Docs
+- update setup classifier
+- update module documentation
+
+
 <a name="0.3.0"></a>
 ## [0.3.0] - 2021-01-30
 ### Feat
 - **output:** stdout output driver
 
+### Pull Requests
+- Merge pull request [#5](https://github.com/bcochofel/terraplanfeed/issues/5) from bcochofel/stdout_output_driver
+
 
 <a name="0.2.0"></a>
 ## [0.2.0] - 2021-01-30
@@ -81,7 +91,8 @@
 - Merge pull request [#1](https://github.com/bcochofel/terraplanfeed/issues/1) from bcochofel/package_skel
 
 
-[Unreleased]: https://github.com/bcochofel/terraplanfeed/compare/0.3.0...HEAD
+[Unreleased]: https://github.com/bcochofel/terraplanfeed/compare/0.3.1...HEAD
+[0.3.1]: https://github.com/bcochofel/terraplanfeed/compare/0.3.0...0.3.1
 [0.3.0]: https://github.com/bcochofel/terraplanfeed/compare/0.2.0...0.3.0
 [0.2.0]: https://github.com/bcochofel/terraplanfeed/compare/0.1.3...0.2.0
 [0.1.3]: https://github.com/bcochofel/terraplanfeed/compare/0.1.2...0.1.3
diff --git a/setup.py b/setup.py
index 51adfe4..f7bc2cf 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
     author="Bruno Cochofel",
     author_email="bruno.cochofel@gmail.com",
     classifiers=[
-        "Development Status :: 3 - Alpha",
+        "Development Status :: 4 - Beta",
         "Environment :: Console",
         "Intended Audience :: Developers",
         "Intended Audience :: System Administrators",
diff --git a/terraplanfeed/__init__.py b/terraplanfeed/__init__.py
index 5165f07..680b7cf 100644
--- a/terraplanfeed/__init__.py
+++ b/terraplanfeed/__init__.py
@@ -7,4 +7,4 @@
 Modules:
     terraform
 """
-__version__ = "0.3.0"
+__version__ = "0.3.1"
diff --git a/terraplanfeed/stdout.py b/terraplanfeed/stdout.py
index 76e5bb4..8271494 100644
--- a/terraplanfeed/stdout.py
+++ b/terraplanfeed/stdout.py
@@ -2,6 +2,11 @@
 STDOUT output driver module.
 
 https://www.terraform.io/docs/internals/json-format.html#change-representation
+
+Functions:
+    getAction: gets the action from actions list
+    parseChanges: gets list of changes and creates multiline summary
+    writeToStdout: writes the summary content to stdout
 """
 import logging