diff --git a/requirements.txt b/requirements.txt
index 275673e1..4b8bcd10 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ pylti==0.7.0
 django-lti-provider==1.0.0
 
 pyparsing<2.3.1
-edtf<=3.0.0
+edtf<=5.0.0
 
 pbr==6.0.0 # bandit
 pyyaml==6.0.1 # bandit