diff --git a/requirements.txt b/requirements.txt
index 0d2f61b..46481b3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,12 @@
 certifi==2016.2.28
-flask==0.11.1
-flask-babel==0.11.1
-lxml==3.6.0
-ndg-httpsclient==0.4.1
+flask==0.*
+flask-babel==0.*
+lxml==3.*
+ndg-httpsclient==0.4.*
 pyasn1==0.1.9
 pyasn1-modules==0.0.8
-pygments==2.1.3
+pygments==2.*
-pyopenssl==0.15.1
+pyopenssl==16.*
-python-dateutil==2.5.3
+python-dateutil==2.*
-pyyaml==3.11
+pyyaml==3.*
-requests[socks]==2.10.0
+requests[socks]==2.*