diff --git a/apps/server/src/services/export/markdown.spec.ts b/apps/server/src/services/export/markdown.spec.ts
index ac9d2aa04..fe1dc1c37 100644
--- a/apps/server/src/services/export/markdown.spec.ts
+++ b/apps/server/src/services/export/markdown.spec.ts
@@ -378,4 +378,10 @@ describe("Markdown export", () => {
         expect(markdownExportService.toMarkdown(html)).toBe(expected);
     });
 
+    it("preserves superscript and subscript", () => {
+        const html = /*html*/`<p>Hello <sup><strong>superscript</strong></sup> <sub><strong>subscript</strong></sub></p>`;
+        const expected = `Hello <sup><strong>superscript</strong></sup> <sub><strong>subscript</strong></sub>`;
+        expect(markdownExportService.toMarkdown(html)).toBe(expected);
+    });
+
 });
diff --git a/apps/server/src/services/export/markdown.ts b/apps/server/src/services/export/markdown.ts
index 6bbaf386d..ed16c6b30 100644
--- a/apps/server/src/services/export/markdown.ts
+++ b/apps/server/src/services/export/markdown.ts
@@ -56,7 +56,7 @@ function toMarkdown(content: string) {
         instance.addRule("math", buildMathFilter());
         instance.addRule("li", buildListItemFilter());
         instance.use(gfm);
-        instance.keep([ "kbd" ]);
+        instance.keep([ "kbd", "sup", "sub" ]);
     }
 
     return instance.turndown(content);
diff --git a/apps/server/src/services/import/markdown.spec.ts b/apps/server/src/services/import/markdown.spec.ts
index c8d06e28e..0bf747a81 100644
--- a/apps/server/src/services/import/markdown.spec.ts
+++ b/apps/server/src/services/import/markdown.spec.ts
@@ -299,4 +299,10 @@ $$`;
         expect(markdownService.renderToHtml(input, "Title")).toStrictEqual(expected);
     });
 
+    it("preserves superscript and subscript", () => {
+        const input = `Hello <sup>superscript</sup> <sub>subscript</sub>`;
+        const expected = /*html*/`<p>Hello <sup>superscript</sup> <sub>subscript</sub></p>`;
+        expect(markdownService.renderToHtml(input, "Title")).toStrictEqual(expected);
+    });
+
 });