diff --git a/serializer.py b/serializer.py
index b0b496b..d6d349d 100644
--- a/serializer.py
+++ b/serializer.py
@@ -1,6 +1,24 @@
+import json
+import subject
+
+
+class TempSubject:
+    def __init__(self, string):
+        self.__dict__ = json.loads(string)
+
+
 def serialize(subject):
     string = subject.__dict__
     for category in string["grades"]:
         for counter, grade in enumerate(string["grades"][category][0]):
             string["grades"][category][0][counter] = grade.__dict__
     return str(string)
+
+
+def deserialize(string):
+    temp = TempSubject(string)
+    _subject = subject.Subject(temp.name, bool(temp.main_subject), bool(temp.oral_exam))
+    for category in temp.grades:
+        _subject.add_grade_category(category, temp.grades[category][1])
+    return _subject
+