diff --git a/sandbox/attributes.py b/sandbox/attributes.py
index 28f5894..77394ef 100644
--- a/sandbox/attributes.py
+++ b/sandbox/attributes.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 from types import FunctionType, FrameType, GeneratorType
 from sys import version_info
 try:
diff --git a/sandbox/blacklist_proxy.py b/sandbox/blacklist_proxy.py
index 90e9188..62bd183 100644
--- a/sandbox/blacklist_proxy.py
+++ b/sandbox/blacklist_proxy.py
@@ -5,7 +5,7 @@
 inherit from dict: Python/ceval.c uses PyDict_SetItem() and an inlined version
 of PyDict_GetItem().
 """
-
+from __future__ import absolute_import
 from .proxy import readOnlyError
 
 def createReadOnlyBuiltins(builtins):
diff --git a/sandbox/builtins.py b/sandbox/builtins.py
index 6ae236b..99f9b97 100644
--- a/sandbox/builtins.py
+++ b/sandbox/builtins.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import __builtin__ as BUILTINS_MODULE
 from types import FrameType
 from sys import _getframe, version_info
diff --git a/sandbox/code.py b/sandbox/code.py
index c278339..5366c1e 100644
--- a/sandbox/code.py
+++ b/sandbox/code.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 from sandbox import Protection
 from _sandbox import disable_code_new, restore_code_new
 
diff --git a/sandbox/cpython.py b/sandbox/cpython.py
index 01cdb5f..82471f9 100644
--- a/sandbox/cpython.py
+++ b/sandbox/cpython.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 from sandbox import HAVE_CSANDBOX
 if HAVE_CSANDBOX:
     from _sandbox import dictionary_of
diff --git a/sandbox/proxy.py b/sandbox/proxy.py
index 7d3049f..2c28cd6 100644
--- a/sandbox/proxy.py
+++ b/sandbox/proxy.py
@@ -1,7 +1,7 @@
 """
 Proxies using a whitelist policy.
 """
-
+from __future__ import absolute_import
 from sys import version_info
 if version_info < (3, 0):
     from types import NoneType, ClassType, InstanceType
diff --git a/sandbox/recursion.py b/sandbox/recursion.py
index b0f356f..6faabb6 100644
--- a/sandbox/recursion.py
+++ b/sandbox/recursion.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import sys
 
 class SetRecursionLimit:
diff --git a/sandbox/restorable_dict.py b/sandbox/restorable_dict.py
index 674916d..ba32200 100644
--- a/sandbox/restorable_dict.py
+++ b/sandbox/restorable_dict.py
@@ -1,3 +1,5 @@
+from __future__ import absolute_import
+
 class RestorableDict:
     def __init__(self, dict):
         self.dict = dict
diff --git a/sandbox/safe_import.py b/sandbox/safe_import.py
index 91d1931..06813f2 100644
--- a/sandbox/safe_import.py
+++ b/sandbox/safe_import.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 from .proxy import proxy, readOnlyError
 
 def createSafeModule(real_module, attributes, safe_attributes):
diff --git a/sandbox/safe_open.py b/sandbox/safe_open.py
index 64ebada..4c18212 100644
--- a/sandbox/safe_open.py
+++ b/sandbox/safe_open.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 from os.path import realpath
 from .proxy import createReadOnlyObject
 from errno import EACCES
diff --git a/sandbox/stdio.py b/sandbox/stdio.py
index 1436b82..236c711 100644
--- a/sandbox/stdio.py
+++ b/sandbox/stdio.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import sys
 from sandbox import SandboxError