diff --git a/compose/config/config_schema_v2.2.json b/compose/config/config_schema_v2.2.json
index e8edb60ed..87ba26ae4 100644
--- a/compose/config/config_schema_v2.2.json
+++ b/compose/config/config_schema_v2.2.json
@@ -235,6 +235,7 @@
         "stdin_open": {"type": "boolean"},
         "stop_grace_period": {"type": "string", "format": "duration"},
         "stop_signal": {"type": "string"},
+        "storage_opt": {"type": "object"},
         "tmpfs": {"$ref": "#/definitions/string_or_list"},
         "tty": {"type": "boolean"},
         "ulimits": {