diff --git a/categories/application.md b/categories/application.md
index 4e493b5..e952fb8 100644
--- a/categories/application.md
+++ b/categories/application.md
@@ -129,6 +129,19 @@ redoc-cli bundle swagger.json
 ```
 Some sample swagger files: <http://rackerlabs.github.io/wadl2swagger/openstack.html>
 
+## Versioning
+
+### Proper define the version of your application
+
+According to [semver](https://semver.org/), the following is the general guideline.
+
+> Given a version number MAJOR.MINOR.PATCH, increment the:
+>
+> 1. MAJOR version when you make incompatible API changes,
+> 2. MINOR version when you add functionality in a backwards-compatible manner, and
+> 3. PATCH version when you make backwards-compatible bug fixes.
+> Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.
+
 # Log and Error
 
 ## Sentry