diff --git a/requirements/dev.in b/requirements/dev.in
index e6fb63e711142376208ba1e63edc8e0f8558771a..509a88ffc08a326516fa5855e4a914701b1a5df4 100644
--- a/requirements/dev.in
+++ b/requirements/dev.in
@@ -8,8 +8,7 @@ Flask-Admin>=1.5.7
 Flask-Login==0.5.0
 SQLAlchemy>=1.4.5
 celery[redis]>=5.0.5
-psycopg2-binary>=2.8.6
-PyMySQL==1.0.2
+mariadb==1.0.6
 wget>=3.2
 pyecharts>=1.9.0
 pyecharts-extras>=0.0.5
diff --git a/src/database.py b/src/database.py
index 538e812e107f8d810071772f703dc32526b00bbe..28d260a8154eef477ddad2306703a9c3b97840b3 100644
--- a/src/database.py
+++ b/src/database.py
@@ -8,6 +8,9 @@ from flask_login import LoginManager
 from logging.config import dictConfig
 from flask_admin import Admin
 from celery import Celery
+import sqlalchemy.dialects
+
+
 # TODO: #210 database.py: logging for Celery on Windows
 from celery.utils.log import LoggingProxy
 
@@ -24,7 +27,7 @@ def create_app():
     login_manager.login_view = 'usr.login'
     login_manager.init_app(my_app)
     my_app.config.from_object("config")
-    my_db_url_mariadb = "mariadb+pymysql://{user}:{pw}@{url}/{db}?charset=utf8mb4".format(
+    my_db_url_mariadb = "mariadb+mariadbconnector://{user}:{pw}@{url}/{db}?charset=utf8mb4".format(
         user=my_app.config['SQLALCHEMY_DATABASE_USER'],
         pw=my_app.config['SQLALCHEMY_DATABASE_PW'],
         url=my_app.config['SQLALCHEMY_DATABASE_HOST'],