diff --git a/requirements.txt b/requirements.txt
index 329526e3..d03113c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-PyQt5<5.12
+PyQt5
 pyqtgraph
 dataclasses; python_version<="3.6"
 qdarkstyle
diff --git a/setup.py b/setup.py
index e73de0ef..92322699 100644
--- a/setup.py
+++ b/setup.py
@@ -117,7 +117,7 @@ def is_psycopg2_exists():
 
 
 install_requires = [
-    "PyQt5<5.12",
+    "PyQt5",
     "qdarkstyle",
     "requests",
     "websocket-client",
diff --git a/vnpy/trader/database/database_mongo.py b/vnpy/trader/database/database_mongo.py
index 333f54ca..e8509478 100644
--- a/vnpy/trader/database/database_mongo.py
+++ b/vnpy/trader/database/database_mongo.py
@@ -326,8 +326,8 @@ class MongoManager(BaseDatabaseManager):
     ) -> Optional["BarData"]:
         s = (
             DbBarData.objects(symbol=symbol, exchange=exchange.value)
-                .order_by("-datetime")
-                .first()
+            .order_by("-datetime")
+            .first()
         )
         if s:
             return s.to_bar()
@@ -338,8 +338,8 @@ class MongoManager(BaseDatabaseManager):
     ) -> Optional["TickData"]:
         s = (
             DbTickData.objects(symbol=symbol, exchange=exchange.value)
-                .order_by("-datetime")
-                .first()
+            .order_by("-datetime")
+            .first()
         )
         if s:
             return s.to_tick()
diff --git a/vnpy/trader/database/database_sql.py b/vnpy/trader/database/database_sql.py
index d3ad3c12..014c298a 100644
--- a/vnpy/trader/database/database_sql.py
+++ b/vnpy/trader/database/database_sql.py
@@ -346,7 +346,7 @@ class SqlManager(BaseDatabaseManager):
                 & (self.class_bar.datetime >= start)
                 & (self.class_bar.datetime <= end)
             )
-                .order_by(self.class_bar.datetime)
+            .order_by(self.class_bar.datetime)
         )
         data = [db_bar.to_bar() for db_bar in s]
         return data
@@ -362,7 +362,7 @@ class SqlManager(BaseDatabaseManager):
                 & (self.class_tick.datetime >= start)
                 & (self.class_tick.datetime <= end)
             )
-                .order_by(self.class_tick.datetime)
+            .order_by(self.class_tick.datetime)
         )
 
         data = [db_tick.to_tick() for db_tick in s]
@@ -386,8 +386,8 @@ class SqlManager(BaseDatabaseManager):
                 & (self.class_bar.exchange == exchange.value)
                 & (self.class_bar.interval == interval.value)
             )
-                .order_by(self.class_bar.datetime.desc())
-                .first()
+            .order_by(self.class_bar.datetime.desc())
+            .first()
         )
         if s:
             return s.to_bar()
@@ -402,8 +402,8 @@ class SqlManager(BaseDatabaseManager):
                 (self.class_tick.symbol == symbol)
                 & (self.class_tick.exchange == exchange.value)
             )
-                .order_by(self.class_tick.datetime.desc())
-                .first()
+            .order_by(self.class_tick.datetime.desc())
+            .first()
         )
         if s:
             return s.to_tick()