diff --git a/requirements.txt b/requirements.txt
index f0ce775a3..a188086d7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ pyparsing==2.1.10
 
 # from ndg-httpsclient
 cffi==1.8.2
-cryptography==1.5
+cryptography==1.8.1
 enum34==1.0.4
 idna==2.0
 ipaddress==1.0.14
@@ -81,10 +81,10 @@ eventlet==0.17.4
 qrcode==5.1
 git+https://github.com/emfcamp/python-barcode#egg=pyBarcode
 git+https://github.com/xhtml2pdf/xhtml2pdf#egg=xhtml2pdf
-httplib2==0.9.2
-html5lib==0.999999
+httplib2==0.10.3
+html5lib==0.999999999
 PyPDF2==1.25.1
-Pillow==2.9.0
+Pillow==4.1.0
 reportlab==3.2.0
 
 # iCal production for schedule