diff --git a/pySim/ts_31_103.py b/pySim/ts_31_103.py
index e1f552f..63ef99e 100644
--- a/pySim/ts_31_103.py
+++ b/pySim/ts_31_103.py
@@ -223,4 +223,6 @@
     }
 }
 
-CardApplicationISIM = CardApplication('ISIM', adf=ADF_ISIM(), sw=sw_isim)
+class CardApplicationISIM(CardApplication):
+    def __init__(self):
+	    super().__init__('ISIM', adf=ADF_ISIM(), sw=sw_isim)