diff --git a/pyproject.toml b/pyproject.toml
index 9c94eb835..2163e1f4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,8 @@ dependencies = [
     "dvc-studio-client>=0.9.2,<1",
     "dvc-task>=0.3.0,<1",
     "flatten_dict<1,>=0.4.1",
-    "flufl.lock>=5",
+    # https://github.com/iterative/dvc/issues/9654
+    "flufl.lock>=5,<8",
     "funcy>=1.14",
     "grandalf<1,>=0.7",
     "hydra-core>=1.1",