diff --git a/api/routes/online.py b/api/routes/online.py
index 335f0ad..08f6551 100644
--- a/api/routes/online.py
+++ b/api/routes/online.py
@@ -37,16 +37,19 @@ def prepare_json(self, start_date=None, end_date=None):
             """Return all data"""
             session = session_creator()
             results = session.query(Online).all()
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is not None and end_date is None:
             """Return all data since datetime"""
             session = session_creator()
             results = session.query(Online).filter(Online.date >= start_date)
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is None and end_date is not None:
             """Return all data after datetime"""
             session = session_creator()
             results = session.query(Online).filter(Online.date <= end_date)
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is not None and end_date is not None:
             """Return all data between two datetimes"""
@@ -54,6 +57,7 @@ def prepare_json(self, start_date=None, end_date=None):
             results = session.query(Online).filter(
                 Online.date <= end_date, Online.date >= start_date
             )
+            session.close()
             return [i.as_dict() for i in results]
 
     def get(self):
diff --git a/api/routes/text.py b/api/routes/text.py
index 4c739fa..09fd66e 100644
--- a/api/routes/text.py
+++ b/api/routes/text.py
@@ -35,16 +35,19 @@ def prepare_json(self, start_date=None, end_date=None):
         if start_date is None and end_date is None:
             session = session_creator()
             results = session.query(Text).all()
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is not None and end_date is None:
             """Return all data since datetime"""
             session = session_creator()
             results = session.query(Text).filter(Text.date >= start_date)
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is None and end_date is not None:
             """Return all data after datetime"""
             session = session_creator()
             results = session.query(Text).filter(Text.date <= end_date)
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is not None and end_date is not None:
             """Return all data between two datetimes"""
@@ -52,6 +55,7 @@ def prepare_json(self, start_date=None, end_date=None):
             results = session.query(Text).filter(
                 Text.date <= end_date, Text.date >= start_date
             )
+            session.close()
             return [i.as_dict() for i in results]
 
     def get(self):
diff --git a/api/routes/voice.py b/api/routes/voice.py
index a405aec..8797e82 100644
--- a/api/routes/voice.py
+++ b/api/routes/voice.py
@@ -34,16 +34,19 @@ def prepare_json(self, start_date=None, end_date=None):
         if start_date is None and end_date is None:
             session = session_creator()
             results = session.query(Voice).all()
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is not None and end_date is None:
             """Return all data since datetime"""
             session = session_creator()
             results = session.query(Voice).filter(Voice.date >= start_date)
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is None and end_date is not None:
             """Return all data after datetime"""
             session = session_creator()
             results = session.query(Voice).filter(Voice.date <= end_date)
+            session.close()
             return [i.as_dict() for i in results]
         if start_date is not None and end_date is not None:
             """Return all data between two datetimes"""
@@ -51,6 +54,7 @@ def prepare_json(self, start_date=None, end_date=None):
             results = session.query(Voice).filter(
                 Voice.date <= end_date, Voice.date >= start_date
             )
+            session.close()
             return [i.as_dict() for i in results]
 
     def get(self):