diff --git a/colorpy/blackbody.py b/colorpy/blackbody.py
index 16da3ae..9152a1a 100644
--- a/colorpy/blackbody.py
+++ b/colorpy/blackbody.py
@@ -67,13 +67,13 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
+from __future__ import absolute_import
+
 import math
 import numpy
 import pylab
 
-import colormodels
-import ciexyz
-import plots
+from . import colormodels, ciexyz, plots
 
 # Physical constants in mks units
 PLANCK_CONSTANT   = 6.6237e-34      # J-sec
diff --git a/colorpy/ciexyz.py b/colorpy/ciexyz.py
index 7ebb5b6..557e6f0 100644
--- a/colorpy/ciexyz.py
+++ b/colorpy/ciexyz.py
@@ -116,9 +116,11 @@ def get_normalized_spectral_line_colors (
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
+from __future__ import absolute_import
+
 import math, numpy
 
-import colormodels
+from . import colormodels
 
 # Assumed physical brightness of the monitor [W/m^2]
 #   80 cd/m^2 * 20.3 mW/cd (assuming light at 556 nm)
diff --git a/colorpy/figures.py b/colorpy/figures.py
index d212d0d..30b1331 100644
--- a/colorpy/figures.py
+++ b/colorpy/figures.py
@@ -42,13 +42,10 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-import colormodels
-import illuminants
-import plots
-import blackbody
-import rayleigh
-import thinfilm
-import misc
+from __future__ import absolute_import
+
+from . import (colormodels, illuminants, plots, blackbody, rayleigh,
+               thinfilm, misc)
 
 def figures ():
     '''Create all the ColorPy sample figures.'''
diff --git a/colorpy/illuminants.py b/colorpy/illuminants.py
index 3a95378..2f5e88a 100644
--- a/colorpy/illuminants.py
+++ b/colorpy/illuminants.py
@@ -88,9 +88,9 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-import ciexyz
-import blackbody
-import plots
+from __future__ import absolute_import
+
+from . import ciexyz, blackbody, plots
 
 # table of CIE Illuminant D65 spectrum.
 # data from: http://cvrl.ioo.ucl.ac.uk/database/data/cie/Illuminantd65.txt
diff --git a/colorpy/misc.py b/colorpy/misc.py
index aa1eb81..b5fd37b 100644
--- a/colorpy/misc.py
+++ b/colorpy/misc.py
@@ -61,11 +61,11 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
+from __future__ import absolute_import
+
 import math, numpy
 
-import colormodels
-import ciexyz
-import plots
+from . import colormodels, ciexyz, plots
 
 # Some sample lists of displayable RGB colors as hex strings
 
diff --git a/colorpy/plots.py b/colorpy/plots.py
index 6ee288c..1af162d 100644
--- a/colorpy/plots.py
+++ b/colorpy/plots.py
@@ -121,13 +121,12 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import math
 import numpy, pylab
 
-import colormodels
-import ciexyz
+from . import colormodels, ciexyz
 
 # Miscellaneous utilities for plots
 
diff --git a/colorpy/rayleigh.py b/colorpy/rayleigh.py
index 6c412bc..4b2d83b 100644
--- a/colorpy/rayleigh.py
+++ b/colorpy/rayleigh.py
@@ -62,14 +62,12 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
+from __future__ import absolute_import
+
 import math
 import numpy, pylab
 
-import colormodels
-import ciexyz
-import illuminants
-import blackbody
-import plots
+from . import colormodels, ciexyz, illuminants, blackbody, plots
 
 def rayleigh_scattering (wl_nm):
     '''Get the Rayleigh scattering factor for the wavelength.
diff --git a/colorpy/test.py b/colorpy/test.py
index f827029..181e29e 100644
--- a/colorpy/test.py
+++ b/colorpy/test.py
@@ -27,16 +27,12 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import unittest
 
-import test_colormodels
-import test_ciexyz
-import test_illuminants
-import test_blackbody
-import test_rayleigh
-import test_thinfilm
+from . import (test_colormodels, test_ciexyz, test_illuminants,
+               test_blackbody, test_rayleigh, test_thinfilm)
 
 def test ():
     # no test cases for plots/misc - but figures.py will exercise those.
diff --git a/colorpy/test_blackbody.py b/colorpy/test_blackbody.py
index f4c7ef6..09f10ab 100644
--- a/colorpy/test_blackbody.py
+++ b/colorpy/test_blackbody.py
@@ -22,14 +22,13 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import math
 import numpy
 import unittest
 
-import blackbody
-import colormodels
+from . import blackbody, colormodels
 
 # FIXME: The following calculation is not working currently.
 # It is an attempt to get the scale of the intensity correct.
diff --git a/colorpy/test_ciexyz.py b/colorpy/test_ciexyz.py
index 75fdd56..c9fc153 100644
--- a/colorpy/test_ciexyz.py
+++ b/colorpy/test_ciexyz.py
@@ -22,12 +22,12 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import random
 import unittest
 
-import ciexyz
+from . import ciexyz
 
 
 class TestCiexyz(unittest.TestCase):
diff --git a/colorpy/test_colormodels.py b/colorpy/test_colormodels.py
index 8d01d66..0ab88fb 100644
--- a/colorpy/test_colormodels.py
+++ b/colorpy/test_colormodels.py
@@ -22,13 +22,12 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import math, random, numpy
 import unittest
 
-import colormodels
-import ciexyz
+from . import colormodels, ciexyz
 
 # Functions to calculate the cutoff point between various algorithms.
 # These do not really belong here...
diff --git a/colorpy/test_illuminants.py b/colorpy/test_illuminants.py
index e0908e7..43f6460 100644
--- a/colorpy/test_illuminants.py
+++ b/colorpy/test_illuminants.py
@@ -22,11 +22,11 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import unittest
 
-import illuminants
+from . import illuminants
 
 
 class TestIlluminants(unittest.TestCase):
diff --git a/colorpy/test_rayleigh.py b/colorpy/test_rayleigh.py
index da7bbff..426d8f6 100644
--- a/colorpy/test_rayleigh.py
+++ b/colorpy/test_rayleigh.py
@@ -22,16 +22,14 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import math
 import numpy
 import random
 import unittest
 
-import ciexyz
-import rayleigh
-import illuminants
+from . import ciexyz, rayleigh, illuminants
 
 
 class TestRayleigh(unittest.TestCase):
diff --git a/colorpy/test_thinfilm.py b/colorpy/test_thinfilm.py
index 6748497..56ba919 100644
--- a/colorpy/test_thinfilm.py
+++ b/colorpy/test_thinfilm.py
@@ -22,13 +22,12 @@
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
-from __future__ import print_function
+from __future__ import print_function, absolute_import
 
 import random
 import unittest
 
-import illuminants
-import thinfilm
+from . import illuminants, thinfilm
 
 
 class TestThinFilm(unittest.TestCase):
diff --git a/colorpy/thinfilm.py b/colorpy/thinfilm.py
index 847eb30..b470ee8 100644
--- a/colorpy/thinfilm.py
+++ b/colorpy/thinfilm.py
@@ -82,12 +82,11 @@ class thin_film (n1, n2, n3, thickness_nm) -
 You should have received a copy of the GNU Lesser General Public License
 along with ColorPy.  If not, see <http://www.gnu.org/licenses/>.
 '''
+from __future__ import absolute_import
+
 import math, cmath, numpy
 
-import colormodels
-import ciexyz
-import illuminants
-import plots
+from . import colormodels, ciexyz, illuminants, plots
 
 class thin_film:
     '''A thin film of dielectric material.'''