diff --git a/requirements.txt b/requirements.txt
index e21d9ef76b31f5b42aaeb5fe84b0da107a0e0bf3..74f3f0abb405b6604eec1339d9c0386ac6630e97 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 six==1.*
-deprecation==1.*
+deprecation>=1.*,<2.*
 numpy==1.*
 scipy>=0.18,<2
 nibabel==2.*