diff --git a/requirements_dev.txt b/requirements_dev.txt
index 528177c..c1cae6d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,14 +1,14 @@
-pip==8.1.2
+pip==9.0.1
 bumpversion==0.5.3
 wheel==0.29.0
 watchdog==0.8.3
-flake8==2.6.0
-tox==2.3.1
-coverage==4.1
-Sphinx==1.4.8
-cryptography==1.7
-PyYAML==3.11
-pytest==2.9.2
+flake8==3.2.1
+tox==2.5.0
+coverage==4.3.4
+Sphinx==1.5.2
+cryptography==1.7.2
+PyYAML==3.12
+pytest==3.0.6
 autopep8==1.2.4
 importmagic==0.1.7
 jedi==0.10.0
@@ -16,4 +16,4 @@ pep8==1.7.0
 rope==0.10.3
 yapf==0.15.2
 mypy==0.470
-docutils==0.12
+docutils==0.13.1