diff --git a/requirements_dev.txt b/requirements_dev.txt
index dca6d34..d9768c6 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,4 +8,4 @@ coverage==4.1
 Sphinx==1.4.5
 cryptography==1.4
 PyYAML==3.11
-pytest==3.0.3
+pytest==3.4.1