diff --git a/res/layout/crypt_keeper_password_field.xml b/res/layout/crypt_keeper_password_field.xml
index 34c7f64..8102658 100644
--- a/res/layout/crypt_keeper_password_field.xml
+++ b/res/layout/crypt_keeper_password_field.xml
@@ -28,6 +28,7 @@
         android:inputType="textPassword"
         android:textSize="16sp"
         android:padding="10sp"
+        android:maxLength="500"
         style="@style/TextAppearance.CryptKeeper_PasswordEntry" />
 
    <include layout="@layout/crypt_keeper_switch_input_method" />
diff --git a/res/layout/crypt_keeper_pin_field.xml b/res/layout/crypt_keeper_pin_field.xml
index 56b4978..a13142e 100644
--- a/res/layout/crypt_keeper_pin_field.xml
+++ b/res/layout/crypt_keeper_pin_field.xml
@@ -28,6 +28,7 @@
         android:inputType="numberPassword"
         android:textSize="28sp"
         android:padding="4sp"
+        android:maxLength="500"
         style="@style/TextAppearance.CryptKeeper_PasswordEntry" />
 
    <include layout="@layout/crypt_keeper_switch_input_method" />