diff --git a/{{cookiecutter.project_slug}}/requirements_dev.txt b/{{cookiecutter.project_slug}}/requirements_dev.txt
index f7984b22d..976fbeae8 100644
--- a/{{cookiecutter.project_slug}}/requirements_dev.txt
+++ b/{{cookiecutter.project_slug}}/requirements_dev.txt
@@ -11,4 +11,5 @@ twine==1.14.0
 Click==7.0{% endif %}
 {% if cookiecutter.use_pytest == 'y' -%}
 pytest==4.6.5
-pytest-runner==5.1{% endif %}
\ No newline at end of file
+pytest-runner==5.1{% endif %}
+pyYAML==5.3.1