diff --git a/requirements.txt b/requirements.txt
index aa1b115..a800949 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,10 @@
-nose
-coverage
-mock
-requests
-enum34
-vcrpy
-pyyaml
+coverage==4.0.3
+enum34==1.1.2
+gevent==1.1rc2
+mock==1.3.0
+nose==1.3.7
+protobuf==2.6.1
+pycrypto==2.6.1
+PyYAML==3.11
+requests==2.9.1
+vcrpy==1.7.4
diff --git a/setup.py b/setup.py
index 0b7f7af..20dba31 100644
--- a/setup.py
+++ b/setup.py
@@ -12,9 +12,11 @@ with open(path.join(here, 'steam/__init__.py'), encoding='utf-8') as f:
     __version__ = f.readline().split('"')[1]
 
 install_requires = [
-    'requests',
-    'vdf',
-    'pycrypto',
+    'requests>=2.9.1',
+    'vdf>=1.10',
+    'pycrypto>=2.6.1',
+    'gevent>=1.1rc2',
+    'protobuf>=2.6.1',
 ]
 
 if sys.version_info < (3, 4):