diff --git a/pyproject.toml b/pyproject.toml
index 0c2c2ea9..6cf3dd0e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ optional-dependencies.dev = [
     "ipdb>=0.13.13,<1",
     "pandas-stubs>=2.2.3,<3",
     "mypy>=1.11.2,<2",
-    "pytest-cov>=5.0.0,<6",
+    "pytest-cov>=6,<7",
     "pytest-random-order>=1.1.1,<2",
     "pytest-xdist>=3.6.1,<4",
     "pytest>=8.3.3,<9",