diff --git a/pyproject.toml b/pyproject.toml
index 37e383d..33bbed4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ ipadic = "^1.0.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.4.0"
-pytest-cov = "^4.1.0"
+pytest-cov = ">=4.1,<6.0"
 pytest-xdist = "^3.3.1"
 black = "^23.7.0"
 flake8 = ">=6.1,<8.0"