diff --git a/app/src/main/java/com/hiroshi/cimoc/core/Download.java b/app/src/main/java/com/hiroshi/cimoc/core/Download.java
index d20b365e..472fa22e 100644
--- a/app/src/main/java/com/hiroshi/cimoc/core/Download.java
+++ b/app/src/main/java/com/hiroshi/cimoc/core/Download.java
@@ -150,8 +150,8 @@ public static DocumentFile updateChapterIndex(ContentResolver resolver, Document
             String jsonString = getJsonFromChapter(task.getTitle(), task.getPath());
             DocumentFile dir1 = DocumentUtils.getOrCreateSubDirectory(root, DOWNLOAD);
             DocumentFile dir2 = DocumentUtils.getOrCreateSubDirectory(dir1, String.valueOf(task.getSource()));
-            DocumentFile dir3 = DocumentUtils.getOrCreateSubDirectory(dir2, task.getCid().replaceAll("/|\\?", ""));
-            DocumentFile dir4 = DocumentUtils.getOrCreateSubDirectory(dir3, DecryptionUtils.urlDecrypt(task.getPath().replaceAll("/|\\?", "-")));
+            DocumentFile dir3 = DocumentUtils.getOrCreateSubDirectory(dir2, task.getCid().replaceAll("[:/(\\\\)(\\?)<>\"(\\|)(\\.)]", ""));
+            DocumentFile dir4 = DocumentUtils.getOrCreateSubDirectory(dir3, DecryptionUtils.urlDecrypt(task.getPath().replaceAll("[:/(\\\\)(\\?)<>\"(\\|)(\\.)]", "-")));
             if (dir4 != null) {
                 DocumentFile file = DocumentUtils.getOrCreateFile(dir4, FILE_INDEX);
                 DocumentUtils.writeStringToFile(resolver, file, "cimoc".concat(jsonString));
@@ -224,8 +224,8 @@ private static List<String> readPathFromJson(String jsonString) throws JSONExcep
     public static DocumentFile getChapterDir(DocumentFile root, Comic comic, Chapter chapter, String title) {
         DocumentFile result = DocumentUtils.findFile(root, DOWNLOAD,
                 String.valueOf(comic.getSource()),
-                comic.getCid().replaceAll("/|\\?", ""),
-                DecryptionUtils.urlDecrypt(chapter.getPath().replaceAll("/|\\?", "-"))
+                comic.getCid().replaceAll("[:/(\\\\)(\\?)<>\"(\\|)(\\.)]", ""),
+                DecryptionUtils.urlDecrypt(chapter.getPath().replaceAll("[:/(\\\\)(\\?)<>\"(\\|)(\\.)]", "-"))
         );
         if (result == null) {
             result = DocumentUtils.findFile(root, DOWNLOAD, title, comic.getTitle(), chapter.getTitle());
diff --git a/app/src/main/java/com/hiroshi/cimoc/service/DownloadService.java b/app/src/main/java/com/hiroshi/cimoc/service/DownloadService.java
index a6149a6f..bf21abbc 100644
--- a/app/src/main/java/com/hiroshi/cimoc/service/DownloadService.java
+++ b/app/src/main/java/com/hiroshi/cimoc/service/DownloadService.java
@@ -8,6 +8,7 @@
 import android.os.IBinder;
 import androidx.annotation.Nullable;
 import androidx.collection.LongSparseArray;
+
 import android.util.Pair;
 
 import com.hiroshi.cimoc.App;
@@ -226,6 +227,7 @@ private boolean RequestAndWrite(DocumentFile parent, Request request, int num, S
                     response = mHttpClient.newCall(request).execute();
                     if (response.isSuccessful()) {
                         String displayName = buildFileName(num, url);
+                        displayName = displayName.replaceAll("[:/(\\\\)(\\?)<>\"(\\|)(\\.)]", "_");
                         DocumentFile file = DocumentUtils.getOrCreateFile(parent, displayName);
                         DocumentUtils.writeBinaryToFile(mContentResolver, file, response.body().byteStream());
                         return true;
diff --git a/app/src/main/java/com/hiroshi/cimoc/source/CopyMH.java b/app/src/main/java/com/hiroshi/cimoc/source/CopyMH.java
index 03e4b56e..08d81cd7 100644
--- a/app/src/main/java/com/hiroshi/cimoc/source/CopyMH.java
+++ b/app/src/main/java/com/hiroshi/cimoc/source/CopyMH.java
@@ -23,6 +23,7 @@
 import java.util.LinkedList;
 import java.util.List;
 
+import okhttp3.Headers;
 import okhttp3.Request;
 import taobe.tec.jcc.JChineseConvertor;
 
@@ -167,4 +168,9 @@ public Request getCheckRequest(String cid) {
     public String parseCheck(String html) {
         return new Node(html).text("div.col-9.comicParticulars-title-right > ul > li:nth-child(5) > span.comicParticulars-right-txt");
     }
+
+    @Override
+    public Headers getHeader() {
+        return Headers.of("Referer", website);
+    }
 }
diff --git a/app/src/main/java/com/hiroshi/cimoc/source/MH160.java b/app/src/main/java/com/hiroshi/cimoc/source/MH160.java
index c462d3da..33655373 100644
--- a/app/src/main/java/com/hiroshi/cimoc/source/MH160.java
+++ b/app/src/main/java/com/hiroshi/cimoc/source/MH160.java
@@ -14,6 +14,7 @@
 import java.util.LinkedList;
 import java.util.List;
 
+import okhttp3.Headers;
 import okhttp3.Request;
 
 /**
@@ -151,4 +152,9 @@ public String parseCheck(String html) {
         return new Node(html).text("div.cy_zhangjie_top > :eq(2) > font");
     }
 
+    @Override
+    public Headers getHeader() {
+        return Headers.of("Referer", baseUrl);
+    }
+
 }