diff --git a/src/eea.corpus/requirements.txt b/src/eea.corpus/requirements.txt
index 16425f8..013f5e7 100644
--- a/src/eea.corpus/requirements.txt
+++ b/src/eea.corpus/requirements.txt
@@ -11,7 +11,7 @@ Chameleon==3.1
 chardet==3.0.4
 cld2-cffi==0.1.4
 click==6.7
-colander==1.4
+colander==1.7.0
 coverage==4.4.1
 cycler==0.10.0
 cymem==1.31.2