diff --git a/lnbits/extensions/lnaddress/models.py b/lnbits/extensions/lnaddress/models.py
index 268831b38..f850271b0 100644
--- a/lnbits/extensions/lnaddress/models.py
+++ b/lnbits/extensions/lnaddress/models.py
@@ -54,4 +54,4 @@ class Addresses(BaseModel):
         identifier = f"{self.username}"
         metadata = [["text/plain", text], ["text/identifier", identifier]]
 
-        return LnurlPayMetadata(metadata)
+        return LnurlPayMetadata(json.dumps(metadata))