diff --git a/CHANGELOG.md b/CHANGELOG.md
index 722d33e..a746cda 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 ## [Unreleased]
 
+## v1.1.0
+
+### Added
+
+- feat: add constraints (isodd, iseven)
+- refactor: refactor constraint (not blank check)
+
 ## v1.0.1
 
 ### Added
diff --git a/example/form.go b/example/form.go
index 926ee3c..183b723 100644
--- a/example/form.go
+++ b/example/form.go
@@ -109,6 +109,7 @@ func CreateDataForm() *form.Form {
 					).
 					WithConstraints(
 						validation.NewRange().WithRange(1, 20),
+						validation.NewIsEven(),
 					),
 				form.NewFieldRange("Range").
 					WithOptions(