diff --git a/lnbits/extensions/satspay/crud.py b/lnbits/extensions/satspay/crud.py
index 2c04bbba..c4d28456 100644
--- a/lnbits/extensions/satspay/crud.py
+++ b/lnbits/extensions/satspay/crud.py
@@ -22,7 +22,7 @@ async def create_charge(
     lnbitswallet: Optional[str] = None,
     webhook: Optional[str] = None,
     completelink: Optional[str] = None,
-    completelinktext: Optional[str] = 'Back to Merchant',
+    completelinktext: Optional[str] = "Back to Merchant",
     time: Optional[int] = None,
     amount: Optional[int] = None,
 ) -> Charges: