diff --git a/mongox/base/getprotection.go b/mongox/base/getprotection.go
index 28b4cc1..12ca266 100644
--- a/mongox/base/getprotection.go
+++ b/mongox/base/getprotection.go
@@ -2,10 +2,12 @@ package base
 
 import (
 	"reflect"
+
+	"github.com/mainnika/mongox-go-driver/v2/mongox/base/protection"
 )
 
 // GetProtection function finds protection field in the source document otherwise returns nil
-func GetProtection(source interface{}) *Protection {
+func GetProtection(source interface{}) *protection.Key {
 
 	v := reflect.ValueOf(source)
 	if v.Kind() != reflect.Ptr || v.IsNil() {
@@ -19,11 +21,11 @@ func GetProtection(source interface{}) *Protection {
 		field := el.Field(i)
 
 		switch field.Interface().(type) {
-		case *Protection:
-			return field.Interface().(*Protection)
-		case Protection:
+		case *protection.Key:
+			return field.Interface().(*protection.Key)
+		case protection.Key:
 			ptr := field.Addr()
-			return ptr.Interface().(*Protection)
+			return ptr.Interface().(*protection.Key)
 		default:
 			continue
 		}
diff --git a/mongox/base/protection.go b/mongox/base/protection/key.go
similarity index 63%
rename from mongox/base/protection.go
rename to mongox/base/protection/key.go
index 84db1c3..d195b0d 100644
--- a/mongox/base/protection.go
+++ b/mongox/base/protection/key.go
@@ -1,11 +1,11 @@
-package base
+package protection
 
 import (
 	"go.mongodb.org/mongo-driver/bson/primitive"
 )
 
-// Protection field stores unique document id and version
-type Protection struct {
+// Key field stores unique document id and version
+type Key struct {
 	X primitive.ObjectID `bson:"_x" json:"_x" index:",hashed"`
 	V int64              `bson:"_v" json:"_v"`
 }
diff --git a/mongox/query/compose.go b/mongox/query/compose.go
index 0553fec..fc9c6d1 100644
--- a/mongox/query/compose.go
+++ b/mongox/query/compose.go
@@ -6,7 +6,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 
-	"github.com/mainnika/mongox-go-driver/v2/mongox/base"
+	"github.com/mainnika/mongox-go-driver/v2/mongox/base/protection"
 )
 
 // Compose is a function to compose filters into a single query
@@ -87,10 +87,10 @@ func applyProtection(q *Query, f interface{}) bool {
 	var v *int64
 
 	switch f := f.(type) {
-	case base.Protection:
+	case protection.Key:
 		x = &f.X
 		v = &f.V
-	case *base.Protection:
+	case *protection.Key:
 		if f == nil {
 			return false
 		}