diff --git a/examples/plausible/.env b/examples/plausible/.env
index cb1407e..9cbc9fd 100644
--- a/examples/plausible/.env
+++ b/examples/plausible/.env
@@ -5,3 +5,4 @@ BASE_URL=https://plausible.example.com:443 # change this
 SECRET_KEY_BASE=9meoKctVLEjZGm+CQwNbgZdAiWnw== # change this to a secure random secret
 DISABLE_REGISTRATION=true
 PSQL_PASS=password
+TOTP_VAULT_KEY=9meoKctVLEjZGm+CQwNbgZdAiWnw== # change this to a secure random secret