diff --git a/src/services/export/single.js b/src/services/export/single.js
index 0e7c4dca9..3e14e485c 100644
--- a/src/services/export/single.js
+++ b/src/services/export/single.js
@@ -34,7 +34,7 @@ async function exportSingleNote(exportContext, branch, format, res) {
             const turndownService = new TurndownService();
             payload = turndownService.turndown(noteContent.content);
             extension = 'md';
-            mime = 'text/markdown'
+            mime = 'text/x-markdown'
         }
     }
     else if (note.type === 'code') {
diff --git a/src/services/import/single.js b/src/services/import/single.js
index 703e55a4a..d513961ef 100644
--- a/src/services/import/single.js
+++ b/src/services/import/single.js
@@ -28,6 +28,8 @@ const CODE_MIME_TYPES = {
     'text/x-kotlin': true,
     'text/x-stex': true,
     'text/x-lua': true,
+    // possibly later migrate to text/markdown as primary MIME
+    'text/markdown': 'text/x-markdown',
     'text/x-markdown': true,
     'text/x-objectivec': true,
     'text/x-pascal': true,
@@ -48,7 +50,7 @@ async function importSingleFile(importContext, file, parentNote) {
     if (importContext.textImportedAsText) {
         if (file.mimetype === 'text/html') {
             return await importHtml(importContext, file, parentNote);
-        } else if (file.mimetype === 'text/markdown') {
+        } else if (['text/markdown', 'text/x-markdown'].includes(file.mimetype)) {
             return await importMarkdown(importContext, file, parentNote);
         } else if (file.mimetype === 'text/plain') {
             return await importPlainText(importContext, file, parentNote);
diff --git a/src/services/import/tar.js b/src/services/import/tar.js
index b092c3cc0..3b1eb1353 100644
--- a/src/services/import/tar.js
+++ b/src/services/import/tar.js
@@ -133,7 +133,7 @@ async function importTar(importContext, fileBuffer, importRootNote) {
         let type = 'file';
 
         if (mime) {
-            if (mime === 'text/html' || mime === 'text/markdown') {
+            if (mime === 'text/html' || ['text/markdown', 'text/x-markdown'].includes(mime)) {
                 type = 'text';
             }
             else if (mime.startsWith('image/')) {
@@ -251,7 +251,7 @@ async function importTar(importContext, fileBuffer, importRootNote) {
             }
         }
 
-        if ((noteMeta && noteMeta.format === 'markdown') || (!noteMeta && mime === 'text/markdown')) {
+        if ((noteMeta && noteMeta.format === 'markdown') || (!noteMeta && ['text/markdown', 'text/x-markdown'].includes(mime))) {
             const parsed = mdReader.parse(content);
             content = mdWriter.render(parsed);
         }