diff --git a/src/Makefile b/src/Makefile
index 75067417f0..d79277f041 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,7 +1,14 @@
-all: localecompile
+all: localecompile staticfiles
+production: localecompile staticfiles compress
 
 localecompile:
-	django-admin compilemessages
+	./manage.py compilemessages
 
 localegen:
-	django-admin makemessages --all
+	./manage.py makemessages --all
+
+staticfiles:
+	./manage.py collectstatic --noinput
+
+compress:
+	./manage.py compress
diff --git a/src/manage.py b/src/manage.py
index 4dbadaca86..ff13d7d950 100755
--- a/src/manage.py
+++ b/src/manage.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import sys
 
diff --git a/src/requirements/banktransfer.txt b/src/requirements/banktransfer.txt
index c60139b830..9bbf199d32 100644
--- a/src/requirements/banktransfer.txt
+++ b/src/requirements/banktransfer.txt
@@ -1,2 +1,2 @@
-chardet
+chardet>=2.3,<3
 
diff --git a/src/requirements/dev.txt b/src/requirements/dev.txt
index 2f51e53d24..1b891edfb0 100644
--- a/src/requirements/dev.txt
+++ b/src/requirements/dev.txt
@@ -1 +1 @@
-django-debug-toolbar>=1.3.0
+django-debug-toolbar>=1.3.0,<2.0
diff --git a/src/requirements/paypal.txt b/src/requirements/paypal.txt
index 19b7672089..5bf92ed3b6 100644
--- a/src/requirements/paypal.txt
+++ b/src/requirements/paypal.txt
@@ -1,2 +1,2 @@
-paypalrestsdk
+paypalrestsdk>=1.9,<1.10,<2.0
 
diff --git a/src/requirements/production.txt b/src/requirements/production.txt
index dc61324746..46b6d34eb7 100644
--- a/src/requirements/production.txt
+++ b/src/requirements/production.txt
@@ -1,12 +1,12 @@
 # Functional requirements
 Django==1.8.1
-python-dateutil
+python-dateutil>=2.4,<2.5
 pytz
-django-bootstrap3
+django-bootstrap3>=5.4,<5.5
 -e git+https://github.com/pretix/django-formset-js.git@master#egg=django-formset-js
 -e git+https://github.com/pretix/cleanerversion.git@pretix#egg=cleanerversion
-django-compressor
-reportlab
+django-compressor>=1.5,<2.0
+reportlab>=3.1.44,<3.2
 -e git+https://github.com/pretix/PyPDF2.git@pretix#egg=PyPDF2
 
 # Deployment / static file compilation requirements
@@ -14,4 +14,4 @@ BeautifulSoup4
 html5lib
 slimit
 lxml
-dj-static
+dj-static==0.0.6
diff --git a/src/requirements/stripe.txt b/src/requirements/stripe.txt
index 599f08002d..51f26a42aa 100644
--- a/src/requirements/stripe.txt
+++ b/src/requirements/stripe.txt
@@ -1,2 +1,2 @@
-stripe
+stripe>=1.22,<1.23