diff --git a/README.md b/README.md
index aec181f..a964e5e 100644
--- a/README.md
+++ b/README.md
@@ -32,10 +32,10 @@ $ python app.py
    WARNING: Do not use the development server in a production environment.
    Use a production WSGI server instead.
  * Debug mode: off
-2018-09-23 14:01:54,639 werkzeug _log():88 INFO      * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
+2018-09-23 14:01:54,639 werkzeug _log():88 INFO      * Running on http://0.0.0.0:6000/ (Press CTRL+C to quit)
 
 ```
-Launch browser and access http://localhost:5000/
+Launch browser and access http://localhost:6000/
 
 ## Pull Request
 If you want to contribute. Open a [pull request](https://github.com/amjad489/pys3browser/pulls)
diff --git a/app.py b/app.py
index b0b8e2e..de231d0 100644
--- a/app.py
+++ b/app.py
@@ -4,7 +4,7 @@
 import logging
 from logging.handlers import RotatingFileHandler
 import os
-import ConfigParser
+import configparser
 import re
 
 logger = logging.getLogger()
@@ -29,15 +29,27 @@ def validate_config_file():
         logging.info("config file exists")
     else:
         logging.error("config file doesn't exists, creating config.")
-        config = ConfigParser.RawConfigParser()
+        config = configparser.RawConfigParser()
         config.add_section('credentials')
         config.set('credentials', 'aws_access_key', '')
         config.set('credentials', 'aws_secret_key', '')
         config.set('credentials', 's3_bucket_name', '')
-        with open(config_file, 'wb') as cfg_file:
+        with open(config_file, 'w') as cfg_file:
             config.write(cfg_file)
 
 
+
+def read_config_file(config_file):
+    config = configparser.RawConfigParser()
+    config.read_file(open(config_file))
+    s3_endpoint_url = config.get('s3_endpoint', 'url', fallback=None)
+    s3_access_id = config.get('credentials', 'aws_access_key', fallback=None)
+    s3_access_key = config.get('credentials', 'aws_secret_key', fallback=None)
+    s3_bucket_name = config.get('credentials', 's3_bucket_name', fallback=None)
+    return s3_endpoint_url, s3_access_id, s3_access_key, s3_bucket_name
+
+
+
 def get_fa_icon(_s3_key):
     _s3_filename, _s3_file_extension = os.path.splitext(_s3_key)
     if re.search(r'(gz|zip|bz2|7z|tar|nar|jar|war|ear)', _s3_file_extension):
@@ -79,12 +91,8 @@ def home_page():
     global conn
     global s3_bucket_name
     validate_config_file()
-    config = ConfigParser.ConfigParser()
-    config.readfp(open(config_file))
-    s3_access_id = config.get('credentials', 'aws_access_key')
-    s3_access_key = config.get('credentials', 'aws_secret_key')
-    s3_bucket_name = config.get('credentials', 's3_bucket_name')
-    conn = boto3.client('s3', aws_access_key_id=s3_access_id, aws_secret_access_key=s3_access_key)
+    s3_endpoint_url, s3_access_id, s3_access_key, s3_bucket_name = read_config_file(config_file)
+    conn = boto3.client('s3', endpoint_url=s3_endpoint_url, aws_access_key_id=s3_access_id, aws_secret_access_key=s3_access_key)
     if s3_access_id and s3_access_key and s3_bucket_name:
         return render_template('index.html', bucketname=s3_bucket_name)
     else:
@@ -159,18 +167,25 @@ def generate():
 def save_config_file():
     global conn
     global s3_bucket_name
-    config = ConfigParser.RawConfigParser()
-    config.readfp(open(config_file))
+    config = configparser.RawConfigParser()
+    config.read_file(open(config_file))
+
+
+    if request.form['s3_url'] not in ["", None]:
+        if not config.has_section('s3_endpoint'):
+            config.add_section('s3_endpoint')
+        config.set('s3_endpoint', 'url', request.form['s3_url'])
+    if not config.has_section('credentials'):
+        config.add_section('credentials')
     config.set('credentials', 'aws_access_key', request.form['accesskey'])
     config.set('credentials', 'aws_secret_key', request.form['secretkey'])
     config.set('credentials', 's3_bucket_name', request.form['bucketname'])
-    with open(config_file, 'wb') as cfg_file:
+    with open(config_file, 'w') as cfg_file:
         config.write(cfg_file)
         logging.info("credentials saved to file.")
-    s3_access_id = config.get('credentials', 'aws_access_key')
-    s3_access_key = config.get('credentials', 'aws_secret_key')
-    s3_bucket_name = config.get('credentials', 's3_bucket_name')
-    conn = boto3.client('s3', aws_access_key_id=s3_access_id, aws_secret_access_key=s3_access_key)
+
+    s3_endpoint_url, s3_access_id, s3_access_key, s3_bucket_name = read_config_file(config_file)
+    conn = boto3.client('s3', endpoint_url=s3_endpoint_url, aws_access_key_id=s3_access_id, aws_secret_access_key=s3_access_key)
     return redirect('/', code=302)
 
 
@@ -183,4 +198,4 @@ def upload_file():
 
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0')
+    app.run(host='0.0.0.0', port=6000)
diff --git a/templates/configure.html b/templates/configure.html
index a2325f7..3a2d59d 100644
--- a/templates/configure.html
+++ b/templates/configure.html
@@ -40,6 +40,10 @@ <h5>Configure S3 credentials.</h5><hr>
         <p>
             Provide the IAM user which has access to S3 bucket. For more details on creating user <a href="https://docs.aws.amazon.com/AmazonS3/latest/dev/using-iam-policies.html" target="_blank">click here</a>
         </p>
+        <div class="form-row">
+            <label for="s3_url">S3 endpoint url (optional)</label>
+            <input type="text" class="form-control" name="s3_url" id="s3_url">
+        </div>
         <div class="form-row">
             <div class="col-md-4 mb-3">
                 <label for="validationCustom01">AWS Access Key</label>
diff --git a/templates/index.html b/templates/index.html
index 8825d8e..f48ca80 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -57,6 +57,10 @@ <h5 class="modal-title" id="exampleModalCenterTitle">Please provide all the deta
       </div>
       <div class="modal-body">
         <form method="post" action="/saveConfig" class="needs-validation p-3 mb-5 rounded" novalidate>
+        <div class="form-row">
+            <label for="s3_url">S3 endpoint url (optional)</label>
+            <input type="text" class="form-control" name="s3_url" id="s3_url">
+        </div>
         <div class="form-row">
             <div class="col-md-4 mb-3">
                 <label for="validationCustom01">AWS Access Key</label>