diff --git a/requirements.txt b/requirements.txt
index 4f042ea..50bdb8c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+appdirs==1.4.0
 chardet==2.3.0
 cssselect==1.0.0
 cssutils==1.0.1
@@ -10,10 +11,13 @@ django-premailer==0.2.0
 gunicorn==19.6.0
 lxml==3.7.2
 olefile==0.44
+packaging==16.8
 Pillow==4.0.0
 premailer==3.0.0
 psycopg2==2.6.2
 pycrypto==2.6.1
+pyparsing==2.1.10
+pytz==2016.10
 reportlab==3.3.0
 requests==2.13.0
 simplejson==3.10.0