Tweak requirements a little bit

f11924be · Paul McCarthy · c7df6212 · f11924be
Commit f11924be authored 7 years ago by Paul McCarthy
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@ six==1.*
 deprecation==1.*
 numpy==1.*
 nibabel==2.*
-indexed_gzip==0.*
+indexed_gzip>=0.6.1,<1
 wxPython>=3.0.2.0,<4.1