diff --git a/sstv/__main__.py b/sstv/__main__.py
index 444c2e9..102c9fb 100644
--- a/sstv/__main__.py
+++ b/sstv/__main__.py
@@ -1,7 +1,8 @@
 """Main entry point for command line program"""
 
-from sys import exit
 import signal
+from sys import exit
+
 import sstv
 
 
diff --git a/sstv/command.py b/sstv/command.py
index d18691d..0e4de3c 100644
--- a/sstv/command.py
+++ b/sstv/command.py
@@ -1,12 +1,14 @@
 """Parsing arguments and starting program from command line"""
 
+import argparse
+from sys import exit
+
+from PIL import Image
+from soundfile import available_formats as available_audio_formats
+
 from .common import log_message
 from .decode import SSTVDecoder
 from .spec import VIS_MAP
-from PIL import Image
-from soundfile import available_formats as available_audio_formats
-from sys import exit
-import argparse
 
 
 class SSTVCommand(object):
diff --git a/sstv/decode.py b/sstv/decode.py
index 50fda0e..f825fbf 100644
--- a/sstv/decode.py
+++ b/sstv/decode.py
@@ -1,11 +1,12 @@
 """Class and methods to decode SSTV signal"""
 
+import numpy as np
+import soundfile
+from PIL import Image
+from scipy.signal.windows import hann
+
 from . import spec
 from .common import log_message, progress_bar
-from PIL import Image
-from scipy.signal.windows import hann
-import numpy as np
-import soundfile
 
 
 def calc_lum(freq):
diff --git a/sstv/encode.py b/sstv/encode.py
index 31dd1a9..1f3b1be 100644
--- a/sstv/encode.py
+++ b/sstv/encode.py
@@ -1,8 +1,9 @@
 """Class and methods to encode SSTV signal"""
 
+import numpy as np
+
 from . import spec
 from .common import log_message, progress_bar
-import numpy as np
 
 
 def calc_freq(lum):