diff --git a/pyproject.toml b/pyproject.toml
index db54dde31..46a885779 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ test = [
   "pyyaml ~= 6.0",
   "pytest ~= 8.3",
   "pytest-clarity ~= 1.0",
-  "pytest-cov ~= 5.0",
+  "pytest-cov >= 5.0.0, < 7.0.0",
   "pytest-env ~= 1.0",
   "pytest-lazy-fixtures ~= 1.1.1",
   "pytest-mock ~= 3.0",