diff --git a/pyproject.toml b/pyproject.toml
index 6fff0e6f8..535744c45 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -102,7 +102,7 @@ license = { text = "BSD 3-Clause License" }
 [project.optional-dependencies]
 test = [
   "pytest>=6.2.4,<8.4.0",
-  "pytest-cov>=4,<6.0",
+  "pytest-cov>=4,<7.0",
   "pytest-xdist>=3.1",
   "pyyaml>=6,<7",
   "diff-cover>=7.3",