diff --git a/requirements.txt b/requirements.txt
index 920f19cd6..4385e090d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ alembic==1.9.1
 apscheduler==3.9.1.post1
 bcrypt==4.0.1
 bleach[css]==5.0.1
-colander==1.8.3
+colander==2.0
 dogpile.cache==1.1.8
 elasticsearch==2.4.1
 elasticsearch_dsl==2.2.0