diff --git a/bunq/sdk/client.py b/bunq/sdk/client.py
index afb28ec..c9e8764 100644
--- a/bunq/sdk/client.py
+++ b/bunq/sdk/client.py
@@ -1,22 +1,13 @@
 import uuid
-
-# Due to compatibility requirements, we are importing a class here.
-try:
-    from json import JSONDecodeError
-except ImportError:
-    from simplejson import JSONDecodeError
+from json import JSONDecodeError
+from urllib.parse import urlencode
 
 import requests
 
-from bunq.sdk.json import converter
-from bunq.sdk import security
 from bunq.sdk import context
 from bunq.sdk import exception
-
-try:
-    from urllib import urlencode
-except ImportError:
-    from urllib.parse import urlencode
+from bunq.sdk import security
+from bunq.sdk.json import converter
 
 
 class ApiClient(object):
diff --git a/setup.cfg b/setup.cfg
index 79bc678..d645be7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,4 +2,4 @@
 # This flag says that the code is written to work on both Python 2 and Python
 # 3. If at all possible, it is good practice to do this. If you cannot, you
 # will need to generate wheels for each Python version that you support.
-universal=1
+universal=0
diff --git a/setup.py b/setup.py
index 0a289b4..d7e9c79 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,6 @@
 
         # Specify the Python versions you support here. In particular, ensure
         # that you indicate whether you support Python 2, Python 3 or both.
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
@@ -64,6 +63,9 @@
         'Programming Language :: Python :: 3.6',
     ],
 
+    # Require Python version equal or more than Python 3.
+    python_requires='>=3',
+
     # Keywords related to the project
     keywords='open-banking sepa bunq finance api payment',