diff --git a/{{cookiecutter.app_name}}/requirements/development.txt b/{{cookiecutter.app_name}}/requirements/development.txt
index 13d6f60..3cb8ee7 100644
--- a/{{cookiecutter.app_name}}/requirements/development.txt
+++ b/{{cookiecutter.app_name}}/requirements/development.txt
@@ -2,7 +2,7 @@
 -r production.txt
 
 # Testing
-pytest
+pytest==4.1.1
 ipdb
 factory-boy
 datadiff