diff --git a/requirements/ci.txt b/requirements/ci.txt
index 4ee66b4..34712f8 100644
--- a/requirements/ci.txt
+++ b/requirements/ci.txt
@@ -1,5 +1,5 @@
 -r dev.txt
-nosexcover
-pep8
-pyflakes
-flake8
+nosexcover>=1.0.10,<2
+pep8>=1.6.2,<2
+pyflakes>=1.0.0,<2
+flake8>=2.5.2,<3
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 6cdda46..4bace18 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -1,3 +1,3 @@
 -r dist.txt
-mock
-django_nose
+mock>=1.0.1,<2
+django_nose>=1.4.2,<2
diff --git a/requirements/dist.txt b/requirements/dist.txt
index 11f956e..cdfb2a4 100644
--- a/requirements/dist.txt
+++ b/requirements/dist.txt
@@ -1,6 +1,6 @@
 django<1.5.0
-django-admin-ext
-django-autoload
-django-fields
+django-admin-ext>=1.0.2,<2
+django-autoload>=0.0.1,<1
+django-fields>=0.2.0,<1
 django-class-registry>=0.0.3
-South
+South>=0.8.4,<1