diff --git a/requirements/dev-requirements.txt b/requirements/dev-requirements.txt
index ee005e608..fb64e7dc6 100644
--- a/requirements/dev-requirements.txt
+++ b/requirements/dev-requirements.txt
@@ -1,10 +1,10 @@
 -r test-requirements.txt
-autopep8
-beautifulsoup4
-django-debug-toolbar
-django-extensions
-flake8
-ipdb
-isort
+autopep8==1.2.2
+beautifulsoup4==4.4.1
+django-debug-toolbar==1.4
+django-extensions==1.6.1
+flake8==2.5.4
+ipdb==0.9.0
+isort==4.2.2
 pygraphviz==1.3rc2
 pytest-ipdb==0.1-prerelease2