diff --git a/lib/src/stores/address_book/address_book_store.dart b/lib/src/stores/address_book/address_book_store.dart
index 803b9008..13bd8f59 100644
--- a/lib/src/stores/address_book/address_book_store.dart
+++ b/lib/src/stores/address_book/address_book_store.dart
@@ -47,7 +47,7 @@ abstract class AddressBookStoreBase with Store {
   void validateAddress(String value, {CryptoCurrency cryptoCurrency}) {
     // XMR (95), ADA (59, 92, 105), BCH (42), BNB (42), BTC (34, 42), DASH (34), EOS (42),
     // ETH (42), LTC (34), NANO (64, 65), TRX (34), USDT (42), XLM (56), XRP (34)
-    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z]{64}\$|^[0-9a-zA-Z]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
+    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z_]{64}\$|^[0-9a-zA-Z_]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
     final regExp = RegExp(pattern);
     isValid = regExp.hasMatch(value);
     if (isValid && cryptoCurrency != null) {
diff --git a/lib/src/stores/exchange/exchange_store.dart b/lib/src/stores/exchange/exchange_store.dart
index 7e5e2ea3..7d20fd6c 100644
--- a/lib/src/stores/exchange/exchange_store.dart
+++ b/lib/src/stores/exchange/exchange_store.dart
@@ -228,7 +228,7 @@ abstract class ExchangeStoreBase with Store {
   void validateAddress(String value, {CryptoCurrency cryptoCurrency}) {
     // XMR (95), ADA (59, 92, 105), BCH (42), BNB (42), BTC (34, 42), DASH (34), EOS (42),
     // ETH (42), LTC (34), NANO (64, 65), TRX (34), USDT (42), XLM (56), XRP (34)
-    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z]{64}\$|^[0-9a-zA-Z]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
+    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z_]{64}\$|^[0-9a-zA-Z_]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
     final regExp = RegExp(pattern);
     isValid = regExp.hasMatch(value);
     if (isValid && cryptoCurrency != null) {
diff --git a/lib/src/stores/send/send_store.dart b/lib/src/stores/send/send_store.dart
index d3b31e5a..bc9972b6 100644
--- a/lib/src/stores/send/send_store.dart
+++ b/lib/src/stores/send/send_store.dart
@@ -161,7 +161,7 @@ abstract class SendStoreBase with Store {
   void validateAddress(String value, {CryptoCurrency cryptoCurrency}) {
     // XMR (95), ADA (59, 92, 105), BCH (42), BNB (42), BTC (34, 42), DASH (34), EOS (42),
     // ETH (42), LTC (34), NANO (64, 65), TRX (34), USDT (42), XLM (56), XRP (34)
-    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z]{64}\$|^[0-9a-zA-Z]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
+    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z_]{64}\$|^[0-9a-zA-Z_]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
     final regExp = RegExp(pattern);
     isValid = regExp.hasMatch(value);
     if (isValid && cryptoCurrency != null) {
diff --git a/lib/src/stores/wallet_restoration/wallet_restoration_store.dart b/lib/src/stores/wallet_restoration/wallet_restoration_store.dart
index c81afdd8..2565bfc2 100644
--- a/lib/src/stores/wallet_restoration/wallet_restoration_store.dart
+++ b/lib/src/stores/wallet_restoration/wallet_restoration_store.dart
@@ -118,7 +118,7 @@ abstract class WalleRestorationStoreBase with Store {
   void validateAddress(String value, {CryptoCurrency cryptoCurrency}) {
     // XMR (95), ADA (59, 92, 105), BCH (42), BNB (42), BTC (34, 42), DASH (34), EOS (42),
     // ETH (42), LTC (34), NANO (64, 65), TRX (34), USDT (42), XLM (56), XRP (34)
-    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z]{64}\$|^[0-9a-zA-Z]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
+    const pattern = '^[0-9a-zA-Z]{95}\$|^[0-9a-zA-Z]{34}\$|^[0-9a-zA-Z]{42}\$|^[0-9a-zA-Z]{56}\$|^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z_]{64}\$|^[0-9a-zA-Z_]{65}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{105}\$';
     final regExp = RegExp(pattern);
     isValid = regExp.hasMatch(value);
     if (isValid && cryptoCurrency != null) {