diff --git a/README.rst b/README.rst
index 89e2356..c54a5b8 100644
--- a/README.rst
+++ b/README.rst
@@ -98,6 +98,11 @@ Quickstart
             plugins=[MarshmallowPlugin()],
         ),
         'APISPEC_SWAGGER_URL': '/swagger/',
+        'APISPEC_AUTH': {
+            'ENABLED': True,
+            'USERNAME': '<username>',
+            'PASSWORD': '<password>'
+        }
     })
     docs = FlaskApiSpec(app)
 
diff --git a/flask_apispec/extension.py b/flask_apispec/extension.py
index c1ef648..1ddd380 100644
--- a/flask_apispec/extension.py
+++ b/flask_apispec/extension.py
@@ -1,12 +1,29 @@
 import flask
 import functools
 import types
+from flask_httpauth import HTTPBasicAuth
 from apispec import APISpec
 from apispec.ext.marshmallow import MarshmallowPlugin
 
 from flask_apispec import ResourceMeta
 from flask_apispec.apidoc import ViewConverter, ResourceConverter
 
+auth = HTTPBasicAuth()
+config = None
+
+
+@auth.verify_password
+def verify_password(username=None, password=None):
+    if "APISPEC_AUTH" not in config or \
+            not config.get("APISPEC_AUTH", {}).get("ENABLED"):
+        return True
+
+    basic_auth = config.get("APISPEC_AUTH")
+    if username == basic_auth.get("USERNAME") and \
+            password == basic_auth.get("PASSWORD"):
+        return True
+    return False
+
 
 class FlaskApiSpec:
     """Flask-apispec extension.
@@ -52,6 +69,8 @@ def __init__(self, app=None, document_options=True):
 
     def init_app(self, app):
         self.app = app
+        global config
+        config = self.app.config
         self.spec = self.app.config.get('APISPEC_SPEC') or \
                     make_apispec(self.app.config.get('APISPEC_TITLE', 'flask-apispec'),
                                  self.app.config.get('APISPEC_VERSION', 'v1'),
@@ -93,6 +112,7 @@ def add_swagger_routes(self):
     def swagger_json(self):
         return flask.jsonify(self.spec.to_dict())
 
+    @auth.login_required
     def swagger_ui(self):
         return flask.render_template('swagger-ui.html')
 
diff --git a/setup.py b/setup.py
index 2f67f59..ed6ee6e 100755
--- a/setup.py
+++ b/setup.py
@@ -4,6 +4,7 @@
 
 REQUIRES = [
     'flask>=0.10.1',
+    'Flask-HTTPAuth>=4.1.0'
     'marshmallow>=3.0.0',
     'webargs>=6.0.0',
     'apispec>=4.0.0',
diff --git a/tests/test_extension.py b/tests/test_extension.py
index 5fba9e7..e410add 100644
--- a/tests/test_extension.py
+++ b/tests/test_extension.py
@@ -1,4 +1,5 @@
 import pytest
+import base64
 from flask import Blueprint
 
 from flask_apispec import doc
@@ -87,6 +88,34 @@ def test_serve_swagger_ui_custom_url(self, app, client):
         FlaskApiSpec(app)
         client.get('/swagger-ui.html')
 
+    def test_serve_swagger_ui_invalid_http_auth(self, app, client):
+        app.config['APISPEC_AUTH'] = dict(
+            ENABLED=True,
+            USERNAME="username",
+            PASSWORD="password"
+        )
+        FlaskApiSpec(app)
+        res = client.get('/swagger-ui/', expect_errors=True)
+        assert res.status_code == 401
+
+    def test_serve_swagger_ui_valid_http_auth(self, app, client):
+        app.config['APISPEC_AUTH'] = dict(
+            ENABLED=True,
+            USERNAME="username",
+            PASSWORD="password"
+        )
+        FlaskApiSpec(app)
+
+        valid_credentials = base64.b64encode(
+            b"username:password"
+        ).decode("utf-8")
+        res = client.get(
+            '/swagger-ui/',
+            headers={"Authorization": "Basic " + valid_credentials},
+            expect_errors=True
+        )
+        assert res.status_code == 200
+
     def test_apispec_config(self, app):
         app.config['APISPEC_TITLE'] = 'test-extension'
         app.config['APISPEC_VERSION'] = '2.1'