diff --git a/pyproject.toml b/pyproject.toml
index a985f60..af8802c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,3 @@
-[build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
-
 [project]
 name = "masque"
 description = "Lithography mask library"
@@ -56,9 +52,15 @@ dev = [
     "masque[text]",
     "masque[manhattanize]",
     "masque[manhattanize_slow]",
-    "ruff>=0.15.1",
+    "matplotlib>=3.10.8",
+    "pytest>=9.0.2",
+    "ruff>=0.15.5",
     "mypy>=1.19.1",
-]
+    ]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
 [tool.hatch.version]
 path = "masque/__init__.py"