diff --git a/setup.py b/setup.py
index 4e3bac6..7423af5 100644
--- a/setup.py
+++ b/setup.py
@@ -9,5 +9,19 @@ setup(name='gridlock',
       author_email='anewusername@gmail.com',
       url='https://mpxd.net/gogs/jan/gridlock',
       packages=['gridlock'],
-     )
+      install_requires=[
+            'numpy'
+      ],
+      dependency_links=[
+            'git+https://mpxd.net/gogs/jan/float_raster.git@release'
+      ],
+      extras_require={
+          'visualization': ['matplotlib'],
+          'visualization-isosurface': [
+                'matplotlib',
+                'skimage',
+                'mpl_toolkits',
+          ],
+      },
+      )