diff --git a/requirements.txt b/requirements.txt
index 74da886..9a369f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-colorclass==2.2.0
-numpy==1.14.3
-pandas==0.22.0
-six==1.11.0
-terminaltables==3.1.0
+colorclass>=2.2.0
+numpy>=1.14.3
+pandas>=0.22.0
+six>=1.11.0
+terminaltables>=3.1.0