diff --git a/doc/upgrade.rst b/doc/upgrade.rst
index e66228dc0..b8a68890a 100644
--- a/doc/upgrade.rst
+++ b/doc/upgrade.rst
@@ -91,6 +91,16 @@ Rebuild Virtual Environment
 Specific instructions
 *********************
 
+1.13.1
+======
+
+Upgrade postfix maps files as follows:
+
+.. sourcecode:: bash
+
+   > python manage.py generate_postfix_maps --destdir <path> --force-overwrite
+
+
 1.13.0
 ======
 
diff --git a/requirements.txt b/requirements.txt
index 65a9d4195..eb80cd838 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ djangorestframework==3.7.3
 bcrypt==3.1.4
 dnspython==1.15.0
 feedparser==5.2.1
-gevent==1.2.2
+gevent==1.4.0
 ipaddress; python_version < '3.3'
 jsonfield==2.0.2
 passlib==1.7.1