diff --git a/requirements_dev.txt b/requirements_dev.txt
index 773a6be..b7256ce 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,14 +1,14 @@
-pip==9.0.1
+pip==9.0.3
 bumpversion==0.5.3
-wheel==0.30.0
+wheel==0.31.0
 watchdog==0.8.3
 flake8==3.5.0
-tox==2.9.1
+tox==3.0.0
 coverage==4.5.1
-Sphinx==1.7.0
+Sphinx==1.7.2
 cryptography==2.1.4
 PyYAML==3.12
-pytest==3.4.0
+pytest==3.5.0
 pytest-runner==4.2
 docutils==0.14
 numpy==1.14.0