diff --git a/requirements-dev.txt b/requirements-dev.txt
index a51d4ef..b137f07 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -18,7 +18,7 @@ mccabe==0.6.1
 pydocstyle==1.1.1
 pep8-naming==0.4.1
 pep8==1.7.0               # via flake8
-py==1.4.32 # via pytest
+py==1.4.33 # via pytest
 pyenchant==1.6.8
 pyflakes==1.5.0 # via flake8
 pygments==2.2.0 # via sphinx