diff --git a/moviepy/audio/fx/volumex.py b/moviepy/audio/fx/volumex.py
index 75d1bf2a0..400da4046 100644
--- a/moviepy/audio/fx/volumex.py
+++ b/moviepy/audio/fx/volumex.py
@@ -1,5 +1,6 @@
 from moviepy.decorators import audio_video_fx
 
+
 @audio_video_fx
 def volumex(clip, factor):
     """ Returns a clip with audio volume multiplied by the
@@ -7,13 +8,14 @@ def volumex(clip, factor):
 
     This effect is loaded as a clip method when you use moviepy.editor,
     so you can just write ``clip.volumex(2)``
-    
+
     Examples
     ---------
 
     >>> newclip = volumex(clip, 2.0) # doubles audio volume
     >>> newclip = clip.fx( volumex, 0.5) # half audio, use with fx
     >>> newclip = clip.volumex(2) # only if you used "moviepy.editor"
-    """ 
+    """
     return clip.fl(lambda gf, t: factor * gf(t),
-    	           keep_duration = True)
+                   keep_duration=True)
+