diff --git a/docs/requirements.txt b/docs/requirements.txt
index 43f96ab..4342b39 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
 docutils==0.14
 Pygments==2.2.0
-Sphinx==1.6.5
+Sphinx==1.6.6
 sphinxcontrib-websupport==1.0.1
diff --git a/requirements.txt b/requirements.txt
index 1b3ad07..9d88c88 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@
 -r docs/requirements.txt
 -r tests/requirements.txt
 
-msgpack-python==0.4.8
+msgpack-python==0.5.1
 ujson==1.35
diff --git a/tests/requirements.txt b/tests/requirements.txt
index c5eea59..c7c80e8 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,10 +1,10 @@
 coverage==4.4.2
 flake8==3.5.0
-isort==4.2.15
+isort==4.3.0
 mypy==0.560
 pycodestyle==2.3.1
 pyflakes==1.6.0
-pytest==3.3.1
+pytest==3.4.0
 pytest-cov==2.5.1
 pytest-isort==0.1.0
 pytest-mock==1.6.3