diff --git a/README.rst b/README.rst
index 9129e57..e294130 100644
--- a/README.rst
+++ b/README.rst
@@ -7,13 +7,20 @@ Module for interacting with various Steam_ features.
 Installation
 ------------
 
+By default the ``steam`` package doesn't install all dependecies.
+Add ``[client]`` extra if you are going to use ``SteamClient``.
+
 Install latest version from PYPI::
 
     pip install -U steam
+    pip install -U steam[client]
 
 Install the current dev version from ``github``::
 
     pip install git+https://github.com/ValvePython/steam
+    pip install git+https://github.com/ValvePython/steam#egg=steam[client]
+
+For extras syntax in ``requirements.txt`` see `pip docs <https://pip.pypa.io/en/stable/reference/pip_install/#requirement-specifiers>`_::
 
 Testing
 -------
diff --git a/requirements.txt b/requirements.txt
index c419743..435faa5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 coverage==4.0.3
 gevent-eventemitter==1.4
-enum34==1.1.2
+enum34==1.1.2; python_version < '3.4'
 gevent==1.1.0
 mock==1.3.0
 nose==1.3.7
diff --git a/setup.py b/setup.py
index 7dfb085..81e2a3d 100644
--- a/setup.py
+++ b/setup.py
@@ -12,14 +12,19 @@ with open(path.join(here, 'steam/__init__.py'), encoding='utf-8') as f:
     __version__ = f.readline().split('"')[1]
 
 install_requires = [
+    'pycrypto>=2.6.1',
     'requests>=2.9.1',
     'vdf>=2.0',
-    'pycrypto>=2.6.1',
-    'gevent>=1.1.0',
-    'gevent-eventemitter>=1.4',
-    'protobuf>=2.6.1',
 ]
 
+install_extras = {
+    'client': [
+        'gevent>=1.1.0',
+        'protobuf>=2.6.1',
+        'gevent-eventemitter>=1.4',
+    ],
+}
+
 if sys.version_info < (3, 4):
     install_requires.append('enum34>=1.0.4')
 
@@ -43,5 +48,6 @@ setup(
     keywords='valve steam steamid api webapi steamcommunity',
     packages=['steam'] + ['steam.'+x for x in find_packages(where='steam')],
     install_requires=install_requires,
+    extras_require=install_extras,
     zip_safe=True,
 )