diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9fb493e..8b79643 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,4 +1,4 @@
-pip==9.0.1
+pip==9.0.2
 bumpversion==0.5.3
 wheel==0.30.0
 watchdog==0.8.3
@@ -6,9 +6,9 @@ flake8==3.5.0
 tox==2.9.1
 coverage==4.5.1
 Sphinx==1.7.1
-twine
+twine==1.10.0
 
 pytest==3.4.2
-pytest-runner==2.11.1
+pytest-runner==4.1
 
-pycryptodome==3.4.11
+pycryptodome==3.5.1