diff --git a/requirements.txt b/requirements.txt
index 705c8b3a..081893f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,29 +1,29 @@
 appdirs==1.4.3
 appnope==0.1.0
-coverage==4.3.4
-decorator==4.0.11
-flake8==3.3.0
-ipdb==0.10.2
-ipython==5.3.0
+coverage==4.4.1
+decorator==4.1.2
+flake8==3.4.1
+ipdb==0.10.3
+ipython==6.2.1
 ipython-genutils==0.2.0
-isort==4.2.5
+isort==4.2.15
 mccabe==0.6.1
 packaging==16.8
 pexpect==4.2.1
 pickleshare==0.7.4
-pluggy==0.4.0
-prompt-toolkit==1.0.13
-ptyprocess==0.5.1
-py==1.4.33
+pluggy==0.5.2
+prompt-toolkit==1.0.15
+ptyprocess==0.5.2
+py==1.4.34
 pycodestyle==2.3.1
-pyflakes==1.5.0
+pyflakes==1.6.0
 Pygments==2.2.0
 pyparsing==2.2.0
-pytest==3.0.7
-pytest-cov==2.4.0
+pytest==3.2.3
+pytest-cov==2.5.1
 simplegeneric==0.8.1
-six==1.10.0
-tox==2.6.0
+six==1.11.0
+tox==2.9.1
 traitlets==4.3.2
 virtualenv==15.1.0
 wcwidth==0.1.7