diff --git a/.travis.yml b/.travis.yml
index 5aefc99..1af77f6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,13 +20,13 @@
       env: PYTHON=3.6.8 TOXENV=py36
     - os: osx
       language: generic
-      env: PYTHON=3.5.6 TOXENV=py35
+      env: PYTHON=3.5.7 TOXENV=py35
     - os: osx
       language: generic
-      env: PYTHON=3.4.9 TOXENV=py34
+      env: PYTHON=3.4.10 TOXENV=py34
     - os: osx
       language: generic
-      env: PYTHON=2.7.15 TOXENV=py27
+      env: PYTHON=2.7.16 TOXENV=py27
 
   allow_failures:
     - env: OPTIONAL=1
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5fea1ed..ebdb195 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,12 +1,12 @@
 bump2version==0.5.10
-coverage==4.5.2
+coverage==4.5.3
 flake8==3.7.7
 mock==2.0.0
 pip==19.0.3
-pytest==4.3.0
+pytest==4.3.1
 pytest-runner==4.4
 six==1.12.0
-Sphinx==1.8.4
+Sphinx==1.8.5
 tox==3.7.0
 twine==1.13.0
 watchdog==0.9.0