diff --git a/app/api/profile/route.ts b/app/api/profile/route.ts
index 2ff3cc7..c2ca04e 100644
--- a/app/api/profile/route.ts
+++ b/app/api/profile/route.ts
@@ -145,7 +145,7 @@ export async function PUT(request: Request) {
       updateData.avatar = avatar || null;
     }
     if (bio !== undefined) {
-      updateData.bio = bio.trim() || null;
+      updateData.bio = bio === null ? null : bio.trim() || null;
     }
     if (characterClass !== undefined) {
       updateData.characterClass = (characterClass as CharacterClass) || null;