diff --git a/src/lnurlp.rs b/src/lnurlp.rs
index c8128b2..8aafee0 100644
--- a/src/lnurlp.rs
+++ b/src/lnurlp.rs
@@ -184,10 +184,16 @@ pub async fn verify(
         return Err(anyhow::anyhow!("NotFound"));
     }
 
+    let preimage = if invoice.state == InvoiceState::Settled as i32 {
+        Some(invoice.preimage)
+    } else {
+        None
+    };
+
     let verify_response = LnurlVerifyResponse {
         status: LnurlStatus::Ok,
         settled: invoice.state == InvoiceState::Settled as i32,
-        preimage: invoice.preimage,
+        preimage,
         pr: invoice.bolt11,
     };
 
diff --git a/src/routes.rs b/src/routes.rs
index f9903b1..189a6c9 100644
--- a/src/routes.rs
+++ b/src/routes.rs
@@ -196,7 +196,7 @@ pub async fn lnurl_callback_route(
 pub struct LnurlVerifyResponse {
     pub status: LnurlStatus,
     pub settled: bool,
-    pub preimage: String,
+    pub preimage: Option<String>,
     pub pr: String,
 }