diff --git a/cmd/web/handlers.go b/cmd/web/handlers.go
index 071a40d..7512e3e 100644
--- a/cmd/web/handlers.go
+++ b/cmd/web/handlers.go
@@ -111,7 +111,7 @@ func (app *application) snippetCreatePost(w http.ResponseWriter, r *http.Request
 	form.CheckField(validator.NotBlank(form.Title), "title", "This field cannot be blank")
 	form.CheckField(validator.MaxChars(form.Title, 100), "title", "This field cannot be more than 100 character long")
 	form.CheckField(validator.NotBlank(form.Content), "content", "This field cannot be blank")
-	form.CheckField(validator.PermittedInt(form.Expires, 1, 7, 365), "expires", "This field must equal 1, 7 and 365")
+	form.CheckField(validator.PermittedValue(form.Expires, 1, 7, 365), "expires", "This field must equal 1, 7 and 365")
 
 	if !form.Valid() {
 		data := app.newTemplateData(r)
diff --git a/internal/validator/validator.go b/internal/validator/validator.go
index 2bcb7e1..f8295ce 100644
--- a/internal/validator/validator.go
+++ b/internal/validator/validator.go
@@ -42,7 +42,7 @@ func MaxChars(value string, n int) bool {
 	return utf8.RuneCountInString(value) <= n
 }
 
-func PermittedInt(value int, permittedValues ...int) bool {
+func PermittedValue[T comparable](value T, permittedValues ...T) bool {
 	for i := range permittedValues {
 		if value == permittedValues[i] {
 			return true