diff --git a/Lesson_4/04_Password Protecting a Resource/models.pyc b/Lesson_4/04_Password Protecting a Resource/models.pyc
index c734696..d2e8399 100644
Binary files a/Lesson_4/04_Password Protecting a Resource/models.pyc and b/Lesson_4/04_Password Protecting a Resource/models.pyc differ
diff --git a/Lesson_4/04_Password Protecting a Resource/views.py b/Lesson_4/04_Password Protecting a Resource/views.py
index e6a6ac2..834052a 100644
--- a/Lesson_4/04_Password Protecting a Resource/views.py	
+++ b/Lesson_4/04_Password Protecting a Resource/views.py	
@@ -1,10 +1,12 @@
+#!/usr/bin/python
+
 from models import Base, User
 from flask import Flask, jsonify, request, url_for, abort, g
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship, sessionmaker
 from sqlalchemy import create_engine
 
-from flask.ext.httpauth import HTTPBasicAuth
+from flask_httpauth import HTTPBasicAuth
 auth = HTTPBasicAuth()
 
 
diff --git "a/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/Solution Code/views.py" "b/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/Solution Code/views.py"
index abb0186..833e1b8 100644
--- "a/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/Solution Code/views.py"	
+++ "b/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/Solution Code/views.py"	
@@ -1,9 +1,10 @@
+#!/usr/bin/python
 from models import Base, User, Bagel
 from flask import Flask, jsonify, request, url_for, abort, g
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship, sessionmaker
 from sqlalchemy import create_engine
-from flask.ext.httpauth import HTTPBasicAuth
+from flask_httpauth import HTTPBasicAuth
 
 auth = HTTPBasicAuth() 
 
diff --git "a/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/starter_code/views.py" "b/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/starter_code/views.py"
index a88914b..967cc38 100644
--- "a/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/starter_code/views.py"	
+++ "b/Lesson_4/05_Mom & Pop\342\200\231s Bagel Shop/starter_code/views.py"	
@@ -1,9 +1,10 @@
+#!/usr/bin/python
 from models import Base, User, Bagel
 from flask import Flask, jsonify, request, url_for, abort, g
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship, sessionmaker
-from sqlalchemy import create_engine
-from flask.ext.httpauth import HTTPBasicAuth
+from sqlalchemy import create_enginefrom
+from flask_httpauth import HTTPBasicAuth
 
 auth = HTTPBasicAuth() 
 
diff --git a/Lesson_4/07_Implementing Token-Based Authentication in Flask/views.py b/Lesson_4/07_Implementing Token-Based Authentication in Flask/views.py
index ed81e4c..4f66f85 100644
--- a/Lesson_4/07_Implementing Token-Based Authentication in Flask/views.py	
+++ b/Lesson_4/07_Implementing Token-Based Authentication in Flask/views.py	
@@ -1,10 +1,11 @@
+#!/usr/bin/python
 from models import Base, User
 from flask import Flask, jsonify, request, url_for, abort, g
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship, sessionmaker
 from sqlalchemy import create_engine
+from flask_httpauth import HTTPBasicAuth
 
-from flask.ext.httpauth import HTTPBasicAuth
 auth = HTTPBasicAuth()
 
 
diff --git a/Lesson_4/08 _Regal Tree Foods/Solution Code/views.py b/Lesson_4/08 _Regal Tree Foods/Solution Code/views.py
index 878a105..cca7a46 100644
--- a/Lesson_4/08 _Regal Tree Foods/Solution Code/views.py	
+++ b/Lesson_4/08 _Regal Tree Foods/Solution Code/views.py	
@@ -1,14 +1,15 @@
+#!/usr/bin/python
 from models import Base, User, Product
 from flask import Flask, jsonify, request, url_for, abort, g
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship, sessionmaker
 from sqlalchemy import create_engine
 
-from flask.ext.httpauth import HTTPBasicAuth
+from flask_httpauth  import HTTPBasicAuth
 auth = HTTPBasicAuth()
 
 
-engine = create_engine('sqlite:///regalTree.db')
+engine = create_engine('sqlite:///regalTree.db?check_same_thread=False')
 
 Base.metadata.bind = engine
 DBSession = sessionmaker(bind=engine)
diff --git a/Lesson_4/08 _Regal Tree Foods/starter_code/views.py b/Lesson_4/08 _Regal Tree Foods/starter_code/views.py
index 7e1f358..bcb59dc 100644
--- a/Lesson_4/08 _Regal Tree Foods/starter_code/views.py	
+++ b/Lesson_4/08 _Regal Tree Foods/starter_code/views.py	
@@ -1,14 +1,15 @@
+#!/usr/bin/python
 from models import Base, User, Product
 from flask import Flask, jsonify, request, url_for, abort, g
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship, sessionmaker
 from sqlalchemy import create_engine
 
-from flask.ext.httpauth import HTTPBasicAuth
+from flask_httpauth  import HTTPBasicAuth
 auth = HTTPBasicAuth()
 
 
-engine = create_engine('sqlite:///regalTree.db')
+engine = create_engine('sqlite:///regalTree.db?check_same_thread=False')
 
 Base.metadata.bind = engine
 DBSession = sessionmaker(bind=engine)