diff --git a/lnurl.py b/lnurl.py
index 2f06426..b192137 100644
--- a/lnurl.py
+++ b/lnurl.py
@@ -38,7 +38,7 @@ async def api_lnurl_response(request: Request, unique_hash: str):
         raise HTTPException(
             status_code=HTTPStatus.NOT_FOUND, detail="Withdraw is spent."
         )
-    url = request.url_for("withdraw.api_lnurl_callback", unique_hash=link.unique_hash)
+    url = str(request.url_for("withdraw.api_lnurl_callback", unique_hash=link.unique_hash))
 
     # Check if url is .onion and change to http
     if urlparse(url).netloc.endswith(".onion"):
@@ -195,7 +195,7 @@ async def api_lnurl_multi_response(request: Request, unique_hash: str, id_unique
             status_code=HTTPStatus.NOT_FOUND, detail="LNURL-withdraw not found."
         )
 
-    url = request.url_for("withdraw.api_lnurl_callback", unique_hash=link.unique_hash)
+    url = str(request.url_for("withdraw.api_lnurl_callback", unique_hash=link.unique_hash))
 
     # Check if url is .onion and change to http
     if urlparse(url).netloc.endswith(".onion"):
diff --git a/models.py b/models.py
index 6b4ba0e..f9c09f7 100644
--- a/models.py
+++ b/models.py
@@ -49,24 +49,24 @@ class WithdrawLink(BaseModel):
             usescssv = self.usescsv.split(",")
             tohash = self.id + self.unique_hash + usescssv[self.number]
             multihash = shortuuid.uuid(name=tohash)
-            url = req.url_for(
+            url = str(req.url_for(
                 "withdraw.api_lnurl_multi_response",
                 unique_hash=self.unique_hash,
                 id_unique_hash=multihash,
-            )
+            ))
         else:
-            url = req.url_for(
+            url = str(req.url_for(
                 "withdraw.api_lnurl_response", unique_hash=self.unique_hash
-            )
+            ))
 
-        return lnurl_encode(str(url))
+        return lnurl_encode(url)
 
     def lnurl_response(self, req: Request) -> LnurlWithdrawResponse:
-        url = req.url_for(
+        url = str(req.url_for(
             name="withdraw.api_lnurl_callback", unique_hash=self.unique_hash
-        )
+        ))
         return LnurlWithdrawResponse(
-            callback=ClearnetUrl(str(url), scheme="https"),
+            callback=ClearnetUrl(url, scheme="https"),
             k1=self.k1,
             minWithdrawable=MilliSatoshi(self.min_withdrawable * 1000),
             maxWithdrawable=MilliSatoshi(self.max_withdrawable * 1000),