diff --git a/compose/config/fields_schema.json b/compose/config/fields_schema.json
index 38dfd2e36..5c7322517 100644
--- a/compose/config/fields_schema.json
+++ b/compose/config/fields_schema.json
@@ -111,8 +111,8 @@
         "read_only": {"type": "boolean"},
         "restart": {"type": "string"},
         "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
-        "stdin_open": {"type": "string"},
-        "tty": {"type": "string"},
+        "stdin_open": {"type": "boolean"},
+        "tty": {"type": "boolean"},
         "user": {"type": "string"},
         "volumes": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
         "volume_driver": {"type": "string"},