diff --git a/pyproject.toml b/pyproject.toml
index 8aa8d03..16dc821 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ test =[
     "jupyter~=1.0",
     "pylint>=2.12,<4.0",
     "pytest>=7.2,<9.0",
-    "pytest-cov~=4.0",
+    "pytest-cov>=4,<6",
 ]
 
 [project.urls]