diff --git a/requirements.txt b/requirements.txt
index baeeb6cf..8d7a6bac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,21 +3,21 @@ contextlib2==0.5.5
 diff-match-patch==20121119
 dj-database-url==0.4.2
 dj-static==0.0.6
-Django==1.11.3
+Django==1.11.4
 django-debug-toolbar==1.8
 django-ical==1.4
 django-recaptcha==1.3.1
 django-registration-redux==1.7
 django-reversion==2.0.9
 django-toolbelt==0.0.1
-premailer==3.1.0
+premailer==3.1.1
 django-widget-tweaks==1.4.1
 gunicorn==19.7.1
 icalendar==3.11.5
 lxml==3.8.0
 Markdown==2.6.8
 Pillow==4.2.1
-psycopg2==2.7.1
+psycopg2==2.7.3
 Pygments==2.2.0
 PyPDF2==1.26.0
 python-dateutil==2.6.1
@@ -32,6 +32,6 @@ static3==0.7.0
 svg2rlg==0.3
 yolk==0.4.3
 z3c.rml==3.2.0
-zope.event==4.2.0
+zope.event==4.3.0
 zope.interface==4.4.2
 zope.schema==4.5.0