diff --git a/requirements.txt b/requirements.txt
index a200dbd1f..3bdfb1757 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,27 +1,26 @@
 # Invenio requirements.
-MySQL-python==1.2.4
+MySQL-python==1.2.5
 rdflib==2.4.2
 reportlab==2.5
 python-dateutil<=1.9999
 python-magic==0.4.2
 http://www.reportlab.com/ftp/pyRXP-1.16-daily-unix.tar.gz
 numpy==1.7.0
 lxml==3.1.2
 mechanize==0.2.5
 python-Levenshtein==0.10.2
-pyPdf==1.13
 PyStemmer==1.3.0
 https://py-editdist.googlecode.com/files/py-editdist-0.3.tar.gz
 feedparser==5.1.3
 BeautifulSoup==3.2.1
 beautifulsoup4==4.1.3
 python-twitter==0.8.7
 msgpack-python==0.3.0
 pyparsing==1.5.6
-requests
-PyPDF2
-rauth
-unidecode
-python-openid
-qrcode
-PIL
+requests==2.2.0
+PyPDF2==1.19
+rauth==0.6.2
+unidecode==0.04.14
+python-openid==2.2.5
+qrcode==4.0.4
+pillow==2.3.0