diff --git a/dvc/stage/serialize.py b/dvc/stage/serialize.py
index 9644ed1b8..f918ad956 100644
--- a/dvc/stage/serialize.py
+++ b/dvc/stage/serialize.py
@@ -156,10 +156,12 @@ def to_single_stage_lockfile(stage: "Stage") -> dict:
     assert stage.cmd
 
     def _dumpd(item):
+        meta_d = item.meta.to_dict()
+        meta_d.pop("isdir", None)
         ret = [
             (item.PARAM_PATH, item.def_path),
             *item.hash_info.to_dict().items(),
-            *item.meta.to_dict().items(),
+            *meta_d.items(),
         ]
 
         return OrderedDict(ret)
diff --git a/setup.cfg b/setup.cfg
index 01bfe710a..4400795a9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -66,7 +66,7 @@ install_requires =
     dvc-render==0.0.10
     dvc-task==0.1.2
     dvclive>=0.10.0
-    dvc-data==0.7.1
+    dvc-data==0.8.0
     dvc-http==2.19.1
     hydra-core>=1.1.0