diff --git a/pyproject.toml b/pyproject.toml
index 04e3070acec7e2dbcc10a4422c7ad9cc571bac89..ad148c2589cd470f1466a426cf91551179c0fa8a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,6 +36,7 @@ numpy  = ">= 1.22"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.2"
+coverage = ">= 6.3.2"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]