diff --git a/README.md b/README.md
index f754ba3a..a97ec0a8 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,5 @@ This repo builds the UDS Identity (keycloak) 0.1.0s used by UDS Identity. In thi
 - `src/Dockerfile` - The Dockerfile used to build the image, `CA_ZIP_URL` and `CA_REGEX_EXCLUSION_FILTER` builds args control the Trust Store
 - `src/plugin` - A custom Keycloak plugin to add x509 certificate auto-enrollment
 - `src/theme` - A custom Keycloak theme for the login, registration, and account management pages
+- `src/truststore` - A script to pull CA certs into a truststore, using the docker build ARGs for `CA_ZIP_URL` (remote URL to a zip file with CA certs) and `CA_REGEX_EXCLUSION_FILTER` (regex for certs to exclude)
 - `src/realm.json` - The UDS Identity realm configuration used by Keycloak on startup (if the realm doesn't exist)