diff --git a/ethjsonrpc/client.py b/ethjsonrpc/client.py
index a4cb2e4..55ce93d 100644
--- a/ethjsonrpc/client.py
+++ b/ethjsonrpc/client.py
@@ -3,6 +3,7 @@
 
 import requests
 from requests.exceptions import ConnectionError as RequestsConnectionError
+from past.builtins import basestring
 from ethereum import utils
 from ethereum.abi import encode_abi, decode_abi
 
diff --git a/ethjsonrpc/utils.py b/ethjsonrpc/utils.py
index bc5919f..1e9fcfd 100644
--- a/ethjsonrpc/utils.py
+++ b/ethjsonrpc/utils.py
@@ -1,4 +1,5 @@
 from ethjsonrpc.constants import BLOCK_TAGS
+from past.builtins import basestring
 
 
 def hex_to_dec(x):
diff --git a/requirements.txt b/requirements.txt
index effd275..952cca2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
-ethereum==1.0.8
-requests==2.9.1
+ethereum==1.5.2
+requests==2.11.1
+future==0.15.2
diff --git a/setup.py b/setup.py
index 4f5a57b..984b5ac 100644
--- a/setup.py
+++ b/setup.py
@@ -20,9 +20,11 @@
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 3',
     ],
     install_requires=[
-        'ethereum==1.0.8',
-        'requests==2.9.1',
+        'ethereum==1.5.2',
+        'requests==2.11.1',
+        'future==0.15.2',
     ],
 )