diff --git a/requirements.txt b/requirements.txt
index 77d121c..b6178de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,4 +25,4 @@ gevent==1.3.4
 # Django
 # ------------------------------------------------------------------------------
 django-storages[boto3]==1.6.6  # https://github.com/jschneier/django-storages
-django-anymail[mailgun]==3.0  # https://github.com/anymail/django-anymail
+django-anymail[mailgun]==8.4  # https://github.com/anymail/django-anymail
diff --git a/requirements/production.txt b/requirements/production.txt
index 724fad6..ae74746 100644
--- a/requirements/production.txt
+++ b/requirements/production.txt
@@ -9,4 +9,4 @@ Collectfast==0.6.2  # https://github.com/antonagestam/collectfast
 # Django
 # ------------------------------------------------------------------------------
 django-storages[boto3]==1.6.6  # https://github.com/jschneier/django-storages
-django-anymail[mailgun]==3.0  # https://github.com/anymail/django-anymail
+django-anymail[mailgun]==8.4  # https://github.com/anymail/django-anymail