diff --git a/pymaven/constants.py b/pymaven/constants.py
index e0ade6a..ed06109 100644
--- a/pymaven/constants.py
+++ b/pymaven/constants.py
@@ -15,7 +15,7 @@
 #
 
 
-VERSION = (0, 1, 0)
+VERSION = (0, 2, 0)
 
 def get_version():
     return '.'.join(str(v) for v in VERSION)
diff --git a/requirements.txt b/requirements.txt
index 5df8423..8cbed91 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-lxml==3.4.4
-requests==2.7.0
+lxml>=3.4.4,<4.0.0
+requests>=2.7.0,<3.0.0
diff --git a/tests/test_client.py b/tests/test_client.py
index e836f78..2c7b1c4 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -82,13 +82,16 @@ def test_get_artifact(self, _LocalRepository):
         _repo.exists.assert_called_with("foo/bar/2.0.0/bar-2.0.0.jar")
         _repo.open.assert_called_with("foo/bar/2.0.0/bar-2.0.0.jar")
 
+        _repo.reset_mock()
         self.assertRaises(MissingArtifactError, client.get_artifact,
                           "foo:bar:3.0")
         _repo.exists.assert_called_with("foo/bar/3.0/bar-3.0.jar")
         _repo.open.assert_not_called()
 
+        _repo.reset_mock()
         self.assertRaises(AssertionError, client.get_artifact,
                           "foo:bar:[1.0,2.0]")
+        _repo.open.assert_not_called()
 
 
 @mock.patch("pymaven.client.HttpRepository._request")