diff --git a/dev-requirements.txt b/dev-requirements.txt
index a158a17e..460208d0 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -3,4 +3,4 @@
 pep8==1.7.0
 pytest==3.8.1
 pytest-pythonpath==0.7.2 # useful for running tests outside tox
-pytest-timeout==1.3.1
+pytest-timeout==1.3.3