diff --git a/morph/grid/local/README.rst b/morph/grid/local/README.rst
index 706f1226d41cfd021f8a1e61212ce3833d59e912..8887c297bc0e2aa300e27f86ff7a0f08535028a5 100644
--- a/morph/grid/local/README.rst
+++ b/morph/grid/local/README.rst
@@ -36,6 +36,8 @@ If you run an older Nixpkgs, retrieve and use the latest Vagrant development ver
 Generating and deploying keys
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+``config.json`` has the paths for the Ristretto and the Stripe secret key files.
+
 Here is a Ristretto key you can use, randomly generated just now::
 
   SILOWzbnkBjxC1hGde9d5Q3Ir/4yLosCLEnEQGAxEQE=