diff --git a/requirements.txt b/requirements.txt
index a6f969f..6ff9d0f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-colander==1.3.3
+colander==1.7.0
 cornice==2.4.0
 hupper==1.0
 iso8601==0.1.11