diff --git a/requirements.txt b/requirements.txt
index 917c31a..d39c14d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-coverage==3.6.0
-requests==2.1.0
-requests_oauthlib==0.4.0
-python-coveralls==2.1.0
-nose-cov==1.6
-responses==0.2.0
+coverage>=3.6.0
+requests>=2.1.0
+requests_oauthlib>=0.4.0
+python-coveralls>=2.1.0
+nose-cov>=1.6
+responses>=0.2.0