diff --git a/pyproject.toml b/pyproject.toml
index 86d5bc73b..1412532c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,10 @@ webptools = "*"
 supervisor = "*"
 superlance = "*"
 
-[tool.poetry.dev-dependencies]
+[tool.poetry.group.dev]
+optional = true
+
+[tool.poetry.group.dev.dependencies]
 pytest = "*"
 
 [build-system]