diff --git a/grum/exampledata.py b/grum/exampledata.py
index 65d8942..48578aa 100644
--- a/grum/exampledata.py
+++ b/grum/exampledata.py
@@ -1,4 +1,5 @@
 import numpy as np
+
 from .plotdesc import PlotDescription
 
 
diff --git a/grum/mdi/mdisubplot.py b/grum/mdi/mdisubplot.py
index af3b4d2..4b33415 100644
--- a/grum/mdi/mdisubplot.py
+++ b/grum/mdi/mdisubplot.py
@@ -1,6 +1,7 @@
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QMdiSubWindow
 import pyqtgraph as pg
+
 from .. import assets
 
 
diff --git a/grum/rpc/rpcserverthread.py b/grum/rpc/rpcserverthread.py
index 631be7f..126e5ab 100644
--- a/grum/rpc/rpcserverthread.py
+++ b/grum/rpc/rpcserverthread.py
@@ -1,5 +1,6 @@
 import atexit
 from threading import Thread
+
 from .rpcserver import RPCServer