diff --git a/requirements_dev.txt b/requirements_dev.txt
index a9b092b..bf9f43d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,4 +10,4 @@ Sphinx==1.6.6
 pygments==2.2.0
 cryptography==2.1.4
 PyYAML==3.12
-pytest==3.3.2
+pytest==3.4.0