diff --git a/pyproject.toml b/pyproject.toml
index 95ba9b4d..63516a82 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ rdflib = "^6.0.2"
 [tool.poetry.dev-dependencies]
 isort = "^5.9.3"
 black = "^21.9b0"
+csvkit = "^1.0.6"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]