diff --git a/requirements.txt b/requirements.txt
index e98f7a60..fec3b0b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,29 +3,29 @@ contextlib2==0.5.5
 diff-match-patch==20121119
 dj-database-url==0.4.2
 dj-static==0.0.6
-Django==1.11.2
+Django==1.11.3
 django-debug-toolbar==1.8
 django-ical==1.4
-django-recaptcha==1.3.0
+django-recaptcha==1.3.1
 django-registration-redux==1.6
 django-reversion==2.0.9
 django-toolbelt==0.0.1
-premailer==3.0.1
+premailer==3.1.0
 django-widget-tweaks==1.4.1
 gunicorn==19.7.1
-icalendar==3.11.4
-lxml==3.7.3
+icalendar==3.11.5
+lxml==3.8.0
 Markdown==2.6.8
-Pillow==4.1.1
+Pillow==4.2.1
 psycopg2==2.7.1
 Pygments==2.2.0
 PyPDF2==1.26.0
 python-dateutil==2.6.0
 pytz==2017.2
-raven==6.0.0
+raven==6.1.0
 reportlab==3.4.0
-selenium==3.4.1
-simplejson==3.10.0
+selenium==3.4.3
+simplejson==3.11.1
 six==1.10.0
 sqlparse==0.2.3
 static3==0.7.0
@@ -33,5 +33,5 @@ svg2rlg==0.3
 yolk==0.4.3
 z3c.rml==3.2.0
 zope.event==4.2.0
-zope.interface==4.4.0
+zope.interface==4.4.2
 zope.schema==4.4.2