diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/encoders/LnWithdrawalUtil.kt b/quartz/src/main/java/com/vitorpamplona/quartz/encoders/LnWithdrawalUtil.kt
index bedf72d653..c93209059b 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/encoders/LnWithdrawalUtil.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/encoders/LnWithdrawalUtil.kt
@@ -4,7 +4,7 @@ import java.util.regex.Pattern
 
 object LnWithdrawalUtil {
     private val withdrawalPattern = Pattern.compile(
-        "lnurl.+",
+        "lnurl1[02-9ac-hj-np-z]+",
         Pattern.CASE_INSENSITIVE
     )