diff --git a/pyproject.toml b/pyproject.toml
index 432da54b7..eff70ea89 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ dev = [
     "types-Authlib~=1.6.5.20251005",
     "jaraco-context~=6.1.0",
     "filelock~=3.20.3; python_version >= '3.10'",
-    "virtualenv~=20.36.1",
+    "virtualenv>=20.36.1,<20.38.0",
     "urllib3~=2.6.3; python_version >= '3.10'",
     "pytest~=8.4.2",
     "pytest-vcr~=1.0.2",