diff --git a/requirements.txt b/requirements.txt
index 97b1333..071e0e0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-requests
-requests_mock
-ratelimit
-docopt
-hypothesis
-pytz
+requests>=2.12.1,
+requests_mock>=1.2.0,
+ratelimit==1.4.1,
+docopt,
+hypothesis,
+pytz,
 pandas
diff --git a/setup.py b/setup.py
index 66e8886..3c0af77 100644
--- a/setup.py
+++ b/setup.py
@@ -6,12 +6,14 @@
 # Read in the version number
 exec(open('src/arcas/version.py', 'r').read())
 
-requirements = ["requests>=2.12.5",
+requirements = ["requests>=2.12.1",
                 "requests_mock>=1.2.0",
                 "ratelimit==1.4.1",
                 "docopt",
-		"hypothesis",
-		"pytz"]
+                "hypothesis",
+                "pytz",
+                "pandas"]
+
 
 def test_suite():
     """Discover all tests in the tests dir"""