diff --git a/pyproject.toml b/pyproject.toml
index caae8e4782674420aaff0741517a8bef613dd7e4..c285373fe0266b3e92f2f3848584407d2ae0790c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,6 +69,7 @@ optional = true
 
 [tool.poetry.group.dev.dependencies]
 black = {extras = ["jupyter"], version = "^22.12.0"}
+cffconvert = "^2.0.0"
 
 [tool.poetry.group.release]
 optional = true