diff --git a/libraries/overleaf-editor-core/lib/file.js b/libraries/overleaf-editor-core/lib/file.js
index 9c8eac4a96..cd4a7e60fe 100644
--- a/libraries/overleaf-editor-core/lib/file.js
+++ b/libraries/overleaf-editor-core/lib/file.js
@@ -129,9 +129,9 @@ class File {
   toStats() {
     const stats = this.data.toStats()
     if (!_.isEmpty(this.metadata)) {
-      stats.nMeta = 1
+      stats.nMetadata = 1
       // Note: Buffer does not exist in frontend. Use string length instead.
-      stats.metaSize = JSON.stringify(this.metadata).length
+      stats.metadataSize = JSON.stringify(this.metadata).length
     }
     return stats
   }
diff --git a/services/history-v1/api/schema.js b/services/history-v1/api/schema.js
index 0effaeb4ad..066e1861a9 100644
--- a/services/history-v1/api/schema.js
+++ b/services/history-v1/api/schema.js
@@ -5,11 +5,14 @@ const Blob = require('overleaf-editor-core').Blob
 
 const hexHashPattern = new RegExp(Blob.HEX_HASH_RX_STRING)
 
-const fileSchema = z.object({
-  hash: z.string().optional(),
-  byteLength: z.number().int().nullable().optional(),
-  stringLength: z.number().int().nullable().optional(),
-})
+const fileSchema = z
+  .object({
+    hash: z.string().optional(),
+    byteLength: z.number().int().nullable().optional(),
+    stringLength: z.number().int().nullable().optional(),
+    metadata: z.object({}).passthrough().optional(),
+  })
+  .passthrough()
 
 const snapshotSchema = z.object({
   files: z.record(z.string(), fileSchema),