diff --git a/public/js/cover.js b/public/js/cover.js
index 830564e..bc6e73f 100644
--- a/public/js/cover.js
+++ b/public/js/cover.js
@@ -325,7 +325,7 @@ $(".ui-save-history").click(() => {
         const blob = new Blob([history], {
             type: "application/json;charset=utf-8"
         });
-        saveAs(blob, `hackmd_history_${moment().format('YYYYMMDDHHmmss')}`);
+        saveAs(blob, `hackmd_history_${moment().format('YYYYMMDDHHmmss')}`, true);
     });
 });
 
diff --git a/public/js/extra.js b/public/js/extra.js
index b0a4bdc..39812fd 100644
--- a/public/js/extra.js
+++ b/public/js/extra.js
@@ -603,7 +603,7 @@ export function exportToRawHTML(view) {
     const blob = new Blob([html], {
         type: "text/html;charset=utf-8"
     });
-    saveAs(blob, filename);
+    saveAs(blob, filename, true);
 }
 
 //extract markdown body to html and compile to template
@@ -635,7 +635,7 @@ export function exportToHTML(view) {
             const blob = new Blob([html], {
                 type: "text/html;charset=utf-8"
             });
-            saveAs(blob, filename);
+            saveAs(blob, filename, true);
         });
     });
 }
diff --git a/public/js/index.js b/public/js/index.js
index 56f4fd3..dd26d37 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -1542,7 +1542,7 @@ ui.toolbar.download.markdown.click(function (e) {
     var blob = new Blob([markdown], {
         type: "text/markdown;charset=utf-8"
     });
-    saveAs(blob, filename);
+    saveAs(blob, filename, true);
 });
 //html
 ui.toolbar.download.html.click(function (e) {
@@ -1922,7 +1922,7 @@ $('#revisionModalDownload').click(function () {
     var blob = new Blob([revision.content], {
         type: "text/markdown;charset=utf-8"
     });
-    saveAs(blob, filename);
+    saveAs(blob, filename, true);
 });
 $('#revisionModalRevert').click(function () {
     if (!revision) return;