diff --git a/pyproject.toml b/pyproject.toml
index d1780ee..b7287b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ python-dateutil = "^2.8"
 [tool.poetry.group.dev.dependencies]
 black = ">23.1,<25.0"
 parameterized = "^0.9.0"
-coverage = "^6.1.2"
+coverage = ">=6.1.2,<8.0.0"
 coveralls = ">=3.3.1,<5.0.0"
 
 [build-system]