diff --git a/src/main/java/io/github/skydynamic/quickbackupmulti/config/QuickBackupMultiConfig.java b/src/main/java/io/github/skydynamic/quickbackupmulti/config/QuickBackupMultiConfig.java
index 70d6eae..c3e3e1f 100644
--- a/src/main/java/io/github/skydynamic/quickbackupmulti/config/QuickBackupMultiConfig.java
+++ b/src/main/java/io/github/skydynamic/quickbackupmulti/config/QuickBackupMultiConfig.java
@@ -66,7 +66,9 @@ public boolean isCheckUpdate() {
     }
 
     public ArrayList<String> getIgnoredFiles() {
-        return config.ignoredFiles;
+        ArrayList<String> ignoredFiles = new ArrayList<>(config.ignoredFiles);
+        ignoredFiles.add("session.lock");
+        return ignoredFiles;
     }