diff --git a/vofs/dev_requirements.txt b/vofs/dev_requirements.txt
index 25c1dd22d..04b97906b 100644
--- a/vofs/dev_requirements.txt
+++ b/vofs/dev_requirements.txt
@@ -1,6 +1,6 @@
 -e ../vos
 -e . 
-pytest>=3.6
+pytest>=4.6
 pytest-cov>=2.5.1
 flake8>=3.4.1
 mock==2.0.0