diff --git a/requirements.txt b/requirements.txt
index 7e9bf5b..4e4edb4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
-pyside
+pyside>=1.2.0
 pyopengl
 cython
 ipython
 pygments
 pyzmq
-numpy
+numpy>=1.9.0
 arrow