diff --git a/README.md b/README.md
index 4e92893..3c57d4b 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,14 @@ You will need a GH PAT with the following scopes (at a minimum):
 
 - `repo` Full control of private repositories
 
+## Special Cases
+
+Setting the `majorVersion` to `all` will support the renovate `all non-major dependencies` updates.
+
+Setting the `majorVersion` to `projen` will support the `projen` native `update-projen-main` workflows.
+
+In these special cases, the `--library` option is ignored and the `--maxAgeDays` parameter comes into play.
+
 ## TODO
 
 - detect and address case where PR is not up-to-date with base branch.
diff --git a/script.js b/script.js
index 76730fe..a760575 100644
--- a/script.js
+++ b/script.js
@@ -259,17 +259,17 @@ export async function script(
     );
 
     // Find the update-main workflow,
+    const workflowPath = `.github/workflows/${workflowName}.yml`;
     const workflows = await octokit.paginate(
       'GET /repos/{owner}/{repo}/actions/workflows',
       { ...baseParams, per_page: 100 },
       (response) => response.data
     );
-    const renovateWf = workflows.find(
-      (w) => w.path === `.github/workflows/${workflowName}.yml`
-    );
+    const renovateWf = workflows.find((w) => w.path === workflowPath);
     // octokit.log.info(JSON.stringify(renovateWf));
     if (renovateWf === undefined) {
-      octokit.log.error('Missing upgrade-main / renovate.yml workflow!');
+      octokit.log.error(`Missing workflow at ${workflowPath}`);
+      return;
     }
     const workflow_id = renovateWf?.id ?? 0; // Should never be 0, but...