diff --git a/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java b/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java
index c2c8ed69..5efd0652 100644
--- a/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java
+++ b/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerManagerActivity.java
@@ -35,6 +35,8 @@ import one.nem.lacerta.data.Document;
 import one.nem.lacerta.data.LacertaLibrary;
 import one.nem.lacerta.model.document.DocumentDetail;
 import one.nem.lacerta.model.document.DocumentMeta;
+import one.nem.lacerta.model.document.page.Page;
+import one.nem.lacerta.processor.DocumentProcessor;
 import one.nem.lacerta.processor.factory.DocumentProcessorFactory;
 import one.nem.lacerta.utils.LacertaLogger;
 import one.nem.lacerta.vcs.factory.LacertaVcsFactory;
@@ -73,7 +75,9 @@ public class ScannerManagerActivity extends AppCompatActivity {
     // Variables
     private ArrayList<Bitmap> croppedImages = new ArrayList<>();
 
-    private boolean single = false;
+    private boolean update = false;
+    private String documentId;
+    private int index = 0;
 
     View view;
 
@@ -104,7 +108,7 @@ public class ScannerManagerActivity extends AppCompatActivity {
             null
     );
 
-    DocumentScanner documentScannerSingle = new DocumentScanner( // TODO-rca: ひどすぎるのでなんとかする
+    DocumentScanner documentScannerUpdate = new DocumentScanner( // TODO-rca: ひどすぎるのでなんとかする
             this,
             (croppedImageResults) -> {
                 logger.debug(TAG, "croppedImage size: " + croppedImageResults.size());
@@ -160,11 +164,12 @@ public class ScannerManagerActivity extends AppCompatActivity {
         Intent intent = getIntent();
         Bundle bundle = intent.getExtras();
         if (bundle != null) {
-            this.single = bundle.getBoolean("single", false);
+            update = bundle.getBoolean("update", false);
+            documentId = bundle.getString("documentId");
+            index = bundle.getInt("index", 0);
         }
-
-        if (this.single) {
-            documentScanner = documentScannerSingle;
+        if (this.update) {
+            documentScanner = documentScannerUpdate;
         }
         documentScanner.startScan();
         // Init
@@ -251,6 +256,22 @@ public class ScannerManagerActivity extends AppCompatActivity {
         });
     }
 
+    private void updatePage() {
+        logger.debug(TAG, "updatePage");
+        // Deprecatedだが、中断機能が存在しないので操作をブロックする目的で(意図的に)使用
+        ProgressDialog dialog = new ProgressDialog(this);
+        dialog.setMessage("保存中..."); // TODO-rca: テキストをリソースに移動
+        dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
+        dialog.setCancelable(false);
+        dialog.show();
+        document.getDocument(documentId).thenAccept((documentDetail) -> {
+            DocumentProcessor documentProcessor = documentProcessorFactory.create(documentDetail);
+            documentProcessor.updatePageAtIndex(croppedImages.get(0), index);
+            document.updateDocument(documentProcessor.getDocumentDetail()).join();
+            dialog.dismiss();
+        });
+    }
+
     private void insertToExistDocument() {
         logger.debug(TAG, "insertToExistDocument");
         LacertaFilePickerDialog dialog = new LacertaFilePickerDialog();
diff --git a/component/viewer/src/main/java/one/nem/lacerta/component/viewer/ViewerBodyFragment.java b/component/viewer/src/main/java/one/nem/lacerta/component/viewer/ViewerBodyFragment.java
index 82c98341..f52576d4 100644
--- a/component/viewer/src/main/java/one/nem/lacerta/component/viewer/ViewerBodyFragment.java
+++ b/component/viewer/src/main/java/one/nem/lacerta/component/viewer/ViewerBodyFragment.java
@@ -1,5 +1,6 @@
 package one.nem.lacerta.component.viewer;
 
+import android.content.Intent;
 import android.os.Bundle;
 
 import androidx.fragment.app.Fragment;
@@ -16,6 +17,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import javax.inject.Inject;
 
 import dagger.hilt.android.AndroidEntryPoint;
+import one.nem.lacerta.component.scanner.ScannerManagerActivity;
 import one.nem.lacerta.data.Document;
 import one.nem.lacerta.data.LacertaLibrary;
 import one.nem.lacerta.utils.LacertaLogger;
@@ -107,7 +109,12 @@ public class ViewerBodyFragment extends Fragment {
                 builder.setTitle("ページを更新しますか？");
 
                 builder.setPositiveButton("更新", (dialog, which) -> {
-                    // update
+                    // ScannerをIntent
+                    Intent intent = new Intent(getActivity(), ScannerManagerActivity.class);
+                    intent.putExtra("update", true);
+                    intent.putExtra("documentId", documentId);
+                    intent.putExtra("index", position);
+                    startActivity(intent);
                 });
                 builder.setNegativeButton("キャンセル", (dialog, which) -> {
                     // cancel