diff --git a/bukuserver/README.md b/bukuserver/README.md
index a6ee8bb..6c70c6e 100644
--- a/bukuserver/README.md
+++ b/bukuserver/README.md
@@ -55,6 +55,7 @@ Following are available os env config available for bukuserver.
 | PER_PAGE | bookmarks per page | positive integer [default: 10] |
 | SECRET_KEY | server secret key | string [default: os.urandom(24)] |
 | URL_RENDER_MODE | url render mode | `full` or `netloc` [default: `full`] |
+| DB | full path to db file | path string [default: standard path for buku] |
 
 Note: `BUKUSERVER_` is the common prefix.
 
diff --git a/bukuserver/server.py b/bukuserver/server.py
index 5f0bfcb..9deb5d6 100644
--- a/bukuserver/server.py
+++ b/bukuserver/server.py
@@ -37,7 +37,7 @@ STATISTIC_DATA = None
 
 def get_tags():
     """get tags."""
-    tags = getattr(flask.g, 'bukudb', BukuDb()).get_tag_all()
+    tags = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB'))).get_tag_all()
     result = {
         'tags': tags[0]
     }
@@ -62,13 +62,13 @@ def network_handle_detail():
 
 
 def tag_list():
-    tags = BukuDb().get_tag_all()
+    tags = BukuDb(current_app.config.get('BUKUSERVER_DB')).get_tag_all()
     result = {'tags': tags[0]}
     return result
 
 
 def tag_detail(tag):
-    bukudb = BukuDb()
+    bukudb = BukuDb(current_app.config.get('BUKUSERVER_DB'))
     if request.method == 'GET':
         tags = bukudb.get_tag_all()
         if tag not in tags[1]:
@@ -92,7 +92,7 @@ def update_tag(tag):
     res = None
     if request.method in ('PUT', 'POST'):
         new_tags = request.form.getlist('tags')
-        result_flag = getattr(flask.g, 'bukudb', BukuDb()).replace_tag(tag, new_tags)
+        result_flag = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB'))).replace_tag(tag, new_tags)
         op_text = 'replace tag [{}] with [{}]'.format(tag, ', '.join(new_tags))
         if request.method == 'PUT' and result_flag and request.path.startswith('/api/'):
             res = jsonify(response.response_template['success']), status.HTTP_200_OK, {'ContentType': 'application/json'}
@@ -112,7 +112,7 @@ def update_tag(tag):
 def bookmarks():
     """Bookmarks."""
     res = None
-    bukudb = getattr(flask.g, 'bukudb', BukuDb())
+    bukudb = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB')))
     page = request.args.get(get_page_parameter(), type=int, default=1)
     per_page = request.args.get(
         get_per_page_parameter(),
@@ -208,7 +208,7 @@ def refresh_bookmarks():
     if request.method == 'POST':
         print(request.form['index'])
         print(request.form['threads'])
-        result_flag = getattr(flask.g, 'bukudb', BukuDb()).refreshdb(request.form['index'], request.form['threads'])
+        result_flag = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB'))).refreshdb(request.form['index'], request.form['threads'])
         if result_flag:
             res = jsonify(response.response_template['success']), status.HTTP_200_OK, {'ContentType': 'application/json'}
         else:
@@ -223,7 +223,7 @@ def bookmark_api(id):
     except ValueError:
         return jsonify(response.response_template['failure']), status.HTTP_400_BAD_REQUEST, \
                {'ContentType': 'application/json'}
-    bukudb = getattr(flask.g, 'bukudb', BukuDb())
+    bukudb = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB')))
     bookmark_form = forms.BookmarkForm()
     is_html_post_request = request.method == 'POST' and not request.path.startswith('/api/')
     if request.method == 'GET':
@@ -286,7 +286,7 @@ def refresh_bookmark(id):
                {'ContentType': 'application/json'}
     res = None
     if request.method == 'POST':
-        result_flag = getattr(flask.g, 'bukudb', BukuDb()).refreshdb(id, request.form['threads'])
+        result_flag = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB'))).refreshdb(id, request.form['threads'])
         if result_flag:
             res = jsonify(response.response_template['success']), status.HTTP_200_OK, {'ContentType': 'application/json'}
         else:
@@ -302,7 +302,7 @@ def get_tiny_url(id):
                {'ContentType': 'application/json'}
     res = None
     if request.method == 'GET':
-        shortened_url = getattr(flask.g, 'bukudb', BukuDb()).tnyfy_url(id)
+        shortened_url = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB'))).tnyfy_url(id)
         if shortened_url is not None:
             result = {
                 'url': shortened_url
@@ -322,7 +322,7 @@ def get_long_url(id):
 
     res = None
     if request.method == 'GET':
-        bookmark = getattr(flask.g, 'bukudb', BukuDb()).get_rec_by_id(id)
+        bookmark = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB'))).get_rec_by_id(id)
         if bookmark is not None:
             result = {
                 'url': bookmark[1],
@@ -342,7 +342,7 @@ def bookmark_range_operations(starting_id, ending_id):
         return jsonify(response.response_template['failure']), status.HTTP_400_BAD_REQUEST, \
                {'ContentType': 'application/json'}
     res = None
-    bukudb = getattr(flask.g, 'bukudb', BukuDb())
+    bukudb = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB')))
     max_id = bukudb.get_max_id()
     if starting_id > max_id or ending_id > max_id:
         return jsonify(response.response_template['failure']), status.HTTP_400_BAD_REQUEST, \
@@ -408,7 +408,7 @@ def search_bookmarks():
         regex = search_bookmarks_form.regex.data
 
     result = {'bookmarks': []}
-    bukudb = getattr(flask.g, 'bukudb', BukuDb())
+    bukudb = getattr(flask.g, 'bukudb', BukuDb(current_app.config.get('BUKUSERVER_DB')))
     found_bookmarks = bukudb.searchdb(keywords, all_keywords, deep, regex)
     found_bookmarks = [] if found_bookmarks is None else found_bookmarks
     page = request.args.get(get_page_parameter(), type=int, default=1)
@@ -475,7 +475,8 @@ def create_app(config_filename=None):
         url_render_mode = views.DEFAULT_URL_RENDER_MODE
     app.config['BUKUSERVER_URL_RENDER_MODE'] = url_render_mode
     app.config['SECRET_KEY'] = os.getenv('BUKUSERVER_SECRET_KEY') or os.urandom(24)
-    bukudb = BukuDb()
+    app.config['BUKUSERVER_DB'] = os.getenv('BUKUSERVER_DB')
+    bukudb = BukuDb(dbfile=app.config['BUKUSERVER_DB'])
     app.app_context().push()
     setattr(flask.g, 'bukudb', bukudb)
 
@@ -513,7 +514,8 @@ def create_app(config_filename=None):
         bukudb, 'Bookmarks', page_size=per_page, url_render_mode=url_render_mode))
     admin.add_view(views.TagModelView(
         bukudb, 'Tags', page_size=per_page))
-    admin.add_view(views.StatisticView('Statistic', endpoint='statistic'))
+    admin.add_view(views.StatisticView(
+        bukudb, 'Statistic', endpoint='statistic'))
     return app
 
 
diff --git a/bukuserver/views.py b/bukuserver/views.py
index 62bdac9..6ada245 100644
--- a/bukuserver/views.py
+++ b/bukuserver/views.py
@@ -482,9 +482,14 @@ class TagModelView(BaseModelView):
 
 class StatisticView(BaseView):  # pylint: disable=too-few-public-methods
 
+    def __init__(self, *args, **kwargs):
+        self.bukudb = args[0]
+        args = list(args[1:])
+        super().__init__(*args, **kwargs)
+
     @expose('/', methods=('GET', 'POST'))
     def index(self):
-        bukudb = BukuDb()
+        bukudb = self.bukudb
         global STATISTIC_DATA
         statistic_data = STATISTIC_DATA
         if not statistic_data or request.method == 'POST':