diff --git a/requirements.txt b/requirements.txt
index 3c97c18..55a7ea7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,8 @@
-cycler==0.10.0
-matplotlib==2.1.2
+cycler>=0.10.0
+matplotlib>=2.1.2
 mss==3.1.2
-nose==1.3.7
-pkg-resources==0.0.0
+nose>=1.3.7
 pynput==1.3.9
-python-dateutil==2.6.1
-python-xlib==0.21
-pytz==2017.3
+python-dateutil>=2.6.1
+python-xlib>=0.21
+pytz>=2017.3