diff --git a/requirements.txt b/requirements.txt
index 74f3f0abb405b6604eec1339d9c0386ac6630e97..51e205639f8e3e8cc298b82ee5116106b036e907 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 six==1.*
-deprecation>=1.*,<2.*
+deprecation>=1.*,<=2.*
 numpy==1.*
 scipy>=0.18,<2
 nibabel==2.*