diff --git a/requirements_dev.txt b/requirements_dev.txt
index d56af8a..8d03fed 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,4 +8,4 @@ coverage==4.2
 Sphinx==1.4.5
 cryptography==1.5
 PyYAML==3.12
-pytest==3.0.2
+pytest==3.4.2