diff --git a/requirements.txt b/requirements.txt
index 7df8860..0071461 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,14 +1,14 @@
-coverage==4.0.3
-gevent-eventemitter==2.0
+six>=1.10.0
+cryptography>=1.3
+requests>=2.9.1
+vdf>=2.0
+gevent>=1.1.0
+protobuf>=3.0.0
+gevent-eventemitter>=2.0
 enum34==1.1.2; python_version < '3.4'
-gevent==1.1.0
+coverage==4.0.3
 mock==1.3.0
 nose==1.3.7
-protobuf==3.2.0
-cryptography==1.3
 PyYAML==3.11
-requests==2.9.1
 vcrpy==1.7.4
-vdf==2.0
 sphinx==1.3.5
-six==1.10.0