diff --git a/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java b/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
index 446758e3..e1ce346e 100644
--- a/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
+++ b/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
@@ -53,6 +53,8 @@ public interface LacertaLibrary {
 
     CompletableFuture<Void> combineDocument(String parentId, String childId);
 
+    CompletableFuture<Void> updateTitleCache(String parentId, String childId, String titleCache);
+
     CompletableFuture<Void> uncombineDocument(String parentId, String childId);
 
 //    CompletableFuture<Void> combineDocument(String parentId, ArrayList<String> childIdList);
diff --git a/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java b/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java
index b36998a1..f35dee8c 100644
--- a/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java
+++ b/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java
@@ -389,6 +389,21 @@ public class LacertaLibraryImpl implements LacertaLibrary {
         logger.debug("LacertaLibraryImpl", "Database Query: Inserted ToxiDocumentEntity");
     }
 
+    @Override
+    public CompletableFuture<Void> updateTitleCache(String parentId, String documentId, String titleCache) {
+        return CompletableFuture.supplyAsync(() -> {
+            ToxiDocumentEntity toxiDocumentEntity = database.toxiDocumentDao().findByParentIdAndChildId(parentId, documentId);
+            if (toxiDocumentEntity == null) {
+                logger.warn("LacertaLibraryImpl", "ToxiDocumentEntity is not found.");
+                return null;
+            }
+            toxiDocumentEntity.titleCache = titleCache;
+            database.toxiDocumentDao().update(toxiDocumentEntity);
+            logger.debug("LacertaLibraryImpl", "Database Query: Updated ToxiDocumentEntity");
+            return null;
+        });
+    }
+
     @Override
     public CompletableFuture<Void> uncombineDocument(String parentId, String childId) {
         return CompletableFuture.supplyAsync(() -> {