diff --git a/fftcg/cards.py b/fftcg/cards.py
index b4dcb8a..da609ad 100644
--- a/fftcg/cards.py
+++ b/fftcg/cards.py
@@ -7,8 +7,6 @@ class Cards(list[Card]):
     __API_URL = "https://fftcg.square-enix-games.com/de/get-cards"
 
     def __init__(self, params: dict[str, any]):
-        list.__init__(self)
-
         # required params:
         #  text
         # supported params:
@@ -20,7 +18,7 @@ class Cards(list[Card]):
             params["text"] = ""
 
         req = requests.post(Cards.__API_URL, json=params)
-        self.extend([Card(card_data) for card_data in req.json()["cards"]])
+        super().__init__([Card(card_data) for card_data in req.json()["cards"]])
 
     def __str__(self) -> str:
         return "\n".join(str(card) for card in self)
diff --git a/fftcg/imageloader.py b/fftcg/imageloader.py
index dff2226..a836152 100644
--- a/fftcg/imageloader.py
+++ b/fftcg/imageloader.py
@@ -9,7 +9,7 @@ from PIL import Image
 
 class ImageLoader(threading.Thread):
     def __init__(self, url_queue: queue.Queue, resolution: tuple[int, int], language: str):
-        threading.Thread.__init__(self)
+        super().__init__()
 
         self.__queue = url_queue
         self.__resolution = resolution
diff --git a/fftcg/opus.py b/fftcg/opus.py
index 24a61a1..3144d20 100644
--- a/fftcg/opus.py
+++ b/fftcg/opus.py
@@ -30,7 +30,7 @@ class Opus(Cards):
             self.__number = "?"
             self.__name = "?"
 
-        Cards.__init__(self, params)
+        super().__init__(params)
 
         # remove reprints
         for card in self: