diff --git a/app/request.py b/app/request.py
index 398ab71..fe7d3fb 100644
--- a/app/request.py
+++ b/app/request.py
@@ -22,8 +22,8 @@ def gen_user_agent(is_mobile):
 
     if is_mobile:
         return MOBILE_UA.format(mozilla, firefox)
-    else:
-        return DESKTOP_UA.format(mozilla, linux, firefox)
+
+    return DESKTOP_UA.format(mozilla, linux, firefox)
 
 
 def gen_query(query, args, config, near_city=None):
diff --git a/app/routes.py b/app/routes.py
index 0139594..c60d4ac 100644
--- a/app/routes.py
+++ b/app/routes.py
@@ -1,22 +1,22 @@
-from app import app
-from app.models.config import Config
-from app.request import Request
-from app.utils.misc import generate_user_keys, valid_user_session
-from app.utils.routing_utils import *
 import argparse
 import base64
-from bs4 import BeautifulSoup
-from cryptography.fernet import Fernet
-from flask import g, jsonify, make_response, request, redirect, render_template, send_file, session
-from functools import wraps
 import io
 import json
 import os
 import pickle
 import urllib.parse as urlparse
-from requests import exceptions
 import uuid
+from functools import wraps
+
 import waitress
+from flask import jsonify, make_response, request, redirect, render_template, send_file, session
+from requests import exceptions
+
+from app import app
+from app.models.config import Config
+from app.request import Request
+from app.utils.misc import valid_user_session
+from app.utils.routing_utils import *
 
 
 def auth_required(f):
@@ -87,7 +87,6 @@ def after_request_func(response):
         for key in session_list:
             session.pop(key)
 
-    response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
     return response
 
 
diff --git a/app/utils/misc.py b/app/utils/misc.py
index 9bd580d..f959abe 100644
--- a/app/utils/misc.py
+++ b/app/utils/misc.py
@@ -1,7 +1,7 @@
 from cryptography.fernet import Fernet
 from flask import current_app as app
 
-SESSION_VALS = ['uuid', 'config', 'fernet_keys']
+REQUIRED_SESSION_VALUES = ['uuid', 'config', 'fernet_keys']
 
 
 def generate_user_keys(cookies_disabled=False) -> dict:
@@ -17,7 +17,7 @@ def generate_user_keys(cookies_disabled=False) -> dict:
 
 def valid_user_session(session):
     # Generate secret key for user if unavailable
-    for value in SESSION_VALS:
+    for value in REQUIRED_SESSION_VALUES:
         if value not in session:
             return False
 
diff --git a/app/utils/routing_utils.py b/app/utils/routing_utils.py
index cfe0b64..40f8a90 100644
--- a/app/utils/routing_utils.py
+++ b/app/utils/routing_utils.py
@@ -32,7 +32,8 @@ class RoutingUtils:
 
     def new_search_query(self) -> str:
         # Generate a new element key each time a new search is performed
-        self.session['fernet_keys']['element_key'] = generate_user_keys(cookies_disabled=self.cookies_disabled)['element_key']
+        self.session['fernet_keys']['element_key'] = generate_user_keys(
+            cookies_disabled=self.cookies_disabled)['element_key']
 
         q = self.request_params.get('q')
 
@@ -46,7 +47,8 @@ class RoutingUtils:
                 pass
 
         # Reset text key
-        self.session['fernet_keys']['text_key'] = generate_user_keys(cookies_disabled=self.cookies_disabled)['text_key']
+        self.session['fernet_keys']['text_key'] = generate_user_keys(
+            cookies_disabled=self.cookies_disabled)['text_key']
 
         # Format depending on whether or not the query is a "feeling lucky" query
         self.feeling_lucky = q.startswith('! ')