diff --git a/requirements.txt b/requirements.txt
index 05052114aa3b62359d89310cb74a649efd411e5f..24ae7f7d492151d606535d79e580bde6f2758676 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,4 @@ numpy==1.*
 scipy>=0.18,<1
 nibabel==2.*
 indexed_gzip>=0.6.1,<1
-wxPython>=3.0.2.0,<4.1
+wxpython>=3.0.2.0,<4.1