diff --git a/tasks.py b/tasks.py
index cdfc8c3..7afbc43 100644
--- a/tasks.py
+++ b/tasks.py
@@ -31,13 +31,13 @@ async def on_invoice_paid(payment: Payment) -> None:
     bitcoinswitch_payment.payment_hash = bitcoinswitch_payment.payload
     bitcoinswitch_payment = await update_bitcoinswitch_payment(bitcoinswitch_payment)
     payload = bitcoinswitch_payment.payload
-    variable = payment.extra.get("variable", False)
-    if variable:
+
+    variable = payment.extra.get("variable")
+    if variable is True:
         payload = str(
             (int(payload) / int(bitcoinswitch_payment.sats))
             * int(payment.extra["amount"])
         )
-
     payload = f"{bitcoinswitch_payment.pin}-{payload}"
 
     comment = payment.extra.get("comment")
diff --git a/views_lnurl.py b/views_lnurl.py
index 4b8f19f..ad857aa 100644
--- a/views_lnurl.py
+++ b/views_lnurl.py
@@ -83,7 +83,7 @@ async def lnurl_params(
     }
     if comment:
         resp["commentAllowed"] = 1500
-    if variable:
+    if variable is True:
         resp["maxSendable"] = price_msat * 360
     return resp
 
@@ -95,7 +95,7 @@ async def lnurl_params(
 )
 async def lnurl_callback(
     payment_id: str,
-    variable: str = Query(None),
+    variable: bool = Query(None),
     amount: int = Query(None),
     comment: str = Query(None),
 ):