diff --git a/pyproject.toml b/pyproject.toml
index 70a4ae6e5..00e2307fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ license = { text = "BSD 3-Clause License" }
 [project.optional-dependencies]
 test = [
   "pytest>=6.2.4,<7.2.0",
-  "pytest-cov>=2.12,<4.0",
+  "pytest-cov>=2.12,<5.0",
   "pytest-xdist",
   "pyyaml>=6,<7",
   "recommonmark",