diff --git a/pyproject.toml b/pyproject.toml
index 8cb6ab9..23adfa3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ Changelog = "https://github.com/binary-butterfly/xml2python/blob/main/CHANGELOG.
 testing = [
     "ruff~=0.11.10",
     "pytest~=8.3.5",
-    "pytest-cov~=6.1.1",
+    "pytest-cov>=6.1.1,<7.1.0",
 ]
 
 [build-system]