diff --git a/ITPlanning/db.py b/ITPlanning/db.py
index fac4267..c5ff613 100644
--- a/ITPlanning/db.py
+++ b/ITPlanning/db.py
@@ -38,7 +38,7 @@ class Appointment(db.Entity):
     id = PrimaryKey(int, auto=True)
     book_datetime = Required(datetime)
     start_datetime = Required(datetime)
-    end_datetime = Required(str)
+    end_datetime = Required(datetime)
     localisation = Optional(str, nullable=True)
     is_unavaillable = Required(bool)
     service = Required(Service)
@@ -128,6 +128,7 @@ def parse_uri(database_uri):
 
 def init_database(database_uri):
     settings = parse_uri(database_uri)
+
     db.bind(**settings)
     db.generate_mapping(check_tables=False)
     try:
@@ -138,3 +139,5 @@ def init_database(database_uri):
 
 def release_database():
     db.disconnect()
+    db.provider = None
+    db.schema = None