diff --git a/requirements.txt b/requirements.txt
index f9cca01..ff9c769 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-six==1.*
+#six==1.*
 numpy==1.*
 matplotlib>=1.5,<3
 wxPython>=3.0.2.0,<4.1
