diff --git a/requirements.txt b/requirements.txt
index 4b84273..19d9c5f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
-requests==2.7.0
-python-dateutil==2.4.2
-six==1.9.0
\ No newline at end of file
+requests>=2.7.0
+python-dateutil>=2.4.2
+six>=1.9.0
+responses>=0.5.1
diff --git a/setup.py b/setup.py
index efeac17..998a429 100644
--- a/setup.py
+++ b/setup.py
@@ -68,10 +68,10 @@
         'pytest-runner'
     ],
     install_requires=[
-        'requests==2.7.0',
-        'python-dateutil==2.4.2',
-        'six==1.9.0',
-        'responses==0.5.1'
+        'requests>=2.7.0',
+        'python-dateutil>=2.4.2',
+        'six>=1.9.0',
+        'responses>=0.5.1'
     ],
     tests_require=[
         'pytest'