diff --git a/requirements.txt b/requirements.txt
index 69fb6965..ae2fa60f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ ecdsa==0.11
 Pygments==1.6
 django-filter==2.2.0
 jsonfield==0.9.22
-python-dateutil==2.2
+python-dateutil>=2.7.0
 https://github.com/glic3rinu/passlib/archive/master.zip
 django-iban==0.3.0
 requests