diff --git a/library/src/main/java/com/jungly/gridpasswordview/GridPasswordView.java b/library/src/main/java/com/jungly/gridpasswordview/GridPasswordView.java
index f2cd372..eb39963 100644
--- a/library/src/main/java/com/jungly/gridpasswordview/GridPasswordView.java
+++ b/library/src/main/java/com/jungly/gridpasswordview/GridPasswordView.java
@@ -10,6 +10,7 @@
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcelable;
+import android.support.annotation.IntDef;
 import android.text.Editable;
 import android.text.InputType;
 import android.text.TextUtils;
@@ -26,6 +27,9 @@
 
 import com.jungly.gridpasswordview.imebugfixer.ImeDelBugFixedEditText;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * ●
  *
@@ -58,6 +62,15 @@ public class GridPasswordView extends LinearLayout implements PasswordView {
     private OnPasswordChangedListener mListener;
     private PasswordTransformationMethod mTransformationMethod;
 
+    public static final int PWD_TYPE_NUMBER = 0;
+    public static final int PWD_TYPE_TEXT = 1;
+    public static final int PWD_TYPE_TEXTVISIBLE = 2;
+    public static final int PWD_TYPE_TEXTWEB = 3;
+
+    @IntDef({PWD_TYPE_NUMBER, PWD_TYPE_TEXT, PWD_TYPE_TEXTVISIBLE, PWD_TYPE_TEXTWEB})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface PasswordType{}
+
     public GridPasswordView(Context context) {
         super(context);
         initViews(context);
@@ -394,20 +407,20 @@ public void setOnPasswordChangedListener(OnPasswordChangedListener listener) {
     }
 
     @Override
-    public void setPasswordType(PasswordType passwordType) {
+    public void setPasswordType(@PasswordType int passwordType) {
         boolean visible = getPassWordVisibility();
         int inputType = InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_VARIATION_PASSWORD;
         switch (passwordType) {
 
-            case TEXT:
+            case PWD_TYPE_TEXT:
                 inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
                 break;
 
-            case TEXTVISIBLE:
+            case PWD_TYPE_TEXTVISIBLE:
                 inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
                 break;
 
-            case TEXTWEB:
+            case PWD_TYPE_TEXTWEB:
                 inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_WEB_PASSWORD;
                 break;
         }
diff --git a/library/src/main/java/com/jungly/gridpasswordview/PasswordType.java b/library/src/main/java/com/jungly/gridpasswordview/PasswordType.java
deleted file mode 100644
index 18b7e67..0000000
--- a/library/src/main/java/com/jungly/gridpasswordview/PasswordType.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.jungly.gridpasswordview;
-
-/**
- * @author Jungly
- * jungly.ik@gmail.com
- * 5/3/21 16:47
- */
-public enum PasswordType {
-
-    NUMBER, TEXT, TEXTVISIBLE, TEXTWEB;
-
-}
diff --git a/library/src/main/java/com/jungly/gridpasswordview/PasswordView.java b/library/src/main/java/com/jungly/gridpasswordview/PasswordView.java
index 2ca0837..456560e 100644
--- a/library/src/main/java/com/jungly/gridpasswordview/PasswordView.java
+++ b/library/src/main/java/com/jungly/gridpasswordview/PasswordView.java
@@ -21,5 +21,5 @@ interface PasswordView {
 
     void setOnPasswordChangedListener(GridPasswordView.OnPasswordChangedListener listener);
 
-    void setPasswordType(PasswordType passwordType);
+    void setPasswordType(@GridPasswordView.PasswordType int passwordType);
 }