diff --git a/stubs/google-cloud-ndb/METADATA.toml b/stubs/google-cloud-ndb/METADATA.toml
index 010ac58b6..ea08a7bb3 100644
--- a/stubs/google-cloud-ndb/METADATA.toml
+++ b/stubs/google-cloud-ndb/METADATA.toml
@@ -1,2 +1,2 @@
 version = "1.11.*"
-requires = ["types-six"]
+requires = []