diff --git a/src/AnonymizedFile.ts b/src/AnonymizedFile.ts
index cc9f6b0..4bb3dd6 100644
--- a/src/AnonymizedFile.ts
+++ b/src/AnonymizedFile.ts
@@ -55,8 +55,9 @@ export default class AnonymizedFile {
 
     const paths = this.anonymizedPath.trim().split("/");
 
-    let currentAnonymized: TreeElement =
-      await this.repository.anonymizedFiles();
+    let currentAnonymized: TreeElement = await this.repository.anonymizedFiles({
+      includeSha: true,
+    });
     let currentOriginal: TreeElement = await this.repository.files();
     let currentOriginalPath = "";
     let isAmbiguous = false;
diff --git a/src/Repository.ts b/src/Repository.ts
index 514acd6..95e5e3d 100644
--- a/src/Repository.ts
+++ b/src/Repository.ts
@@ -40,20 +40,22 @@ export default class Repository {
    * @param opt force to get an updated list of files
    * @returns The anonymized file tree
    */
-  async anonymizedFiles(opt?: { force?: boolean }): Promise<Tree> {
+  async anonymizedFiles(opt?: {
+    /** Force to refresh the file tree */
+    force?: boolean;
+    /** Include the file sha in the response */
+    includeSha: boolean;
+  }): Promise<Tree> {
     const terms = this._model.options.terms || [];
 
     function anonymizeTreeRecursive(tree: TreeElement): TreeElement {
       if (Number.isInteger(tree.size) && tree.sha !== undefined) {
-        return tree as TreeFile;
+        if (opt?.includeSha) return tree as TreeFile;
+        return { size: tree.size } as TreeFile;
       }
       const output: Tree = {};
       for (const file in tree) {
         const anonymizedPath = anonymizePath(file, terms);
-        if (output[anonymizedPath]) {
-          // file anonymization conflict
-          
-        }
         output[anonymizedPath] = anonymizeTreeRecursive(tree[file]);
       }
       return output;
diff --git a/src/routes/repository-public.ts b/src/routes/repository-public.ts
index d08ed4d..0762498 100644
--- a/src/routes/repository-public.ts
+++ b/src/routes/repository-public.ts
@@ -40,7 +40,7 @@ router.get(
     const repo = await getRepo(req, res);
     if (!repo) return;
     try {
-      res.json(await repo.anonymizedFiles({ force: true }));
+      res.json(await repo.anonymizedFiles({ includeSha: false }));
     } catch (error) {
       handleError(error, res);
     }