diff --git a/game.py b/game.py
index 0b0633d..23c1e0b 100644
--- a/game.py
+++ b/game.py
@@ -1,5 +1,6 @@
 from enum import Enum
 from random import shuffle
+from json import JSONEncoder
 
 class BridzikException(Exception):
     pass
@@ -51,7 +52,7 @@ class Card_values(Enum):
         return NotImplemented
 
 
-class Card():
+class Card(JSONEncoder):
     def __init__(self, color: Card_colors, value: Card_values):
         self.color = color
         self.value = value
@@ -68,6 +69,16 @@ class Card():
     def __repr__(self):
         return '<Card {}_{}>'.format(self.color.name, self.value.name)
 
+    class JSONEncoder(JSONEncoder):
+        def default(self, obj):
+            if isinstance(obj, Card):
+                return {
+                    'color': obj.color.name,
+                    'value': obj.value.name
+                }
+            return JSONEncoder.default(self, obj)
+
+
 cards = [Card(color, value) for value in Card_values for color in Card_colors]
 
 # for series_number in range(4): # 4 hry