diff --git a/pyproject.toml b/pyproject.toml
index c58256d..b790025 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,14 @@ Documentation = "https://doubletdetection.readthedocs.io/"
 Homepage = "https://github.com/JonathanShor/DoubletDetection"
 
 [project.optional-dependencies]
-dev = ["black>=20.8b1", "flake8>=3.7.7", "pre-commit>=2.7.1", "pytest>=4.4"]
+dev = [
+    "black>=20.8b1",
+    "flake8>=3.7.7",
+    "pre-commit>=2.7.1",
+    "pytest>=4.4",
+    "louvain",
+    "leidenalg",
+]
 docs = [
     "sphinx>=4.1,<4.4",
     "sphinx-autodoc-typehints",