diff --git a/setup.py b/setup.py
index c70b991..3c5b47d 100644
--- a/setup.py
+++ b/setup.py
@@ -15,9 +15,8 @@
     requirements = file.readlines()
 
 extras = {
-    'dev': [
-        'wheel','versioneer'
-    ]
+    'dev': ['wheel','versioneer',],
+	'plot': ['ipvolume', 'ipywidgets'],
 }
 
 test_requirements = ['pytest']
@@ -36,7 +35,6 @@
         "Programming Language :: Python :: 3",
         "Operating System :: OS Independent",
     ],
-    extras_require={'plot': ['ipvolume', 'ipywidgets']}
     python_requires='>=3.5',
 
     install_requires=requirements,