diff --git a/src/frontend/src/components/EdictBoard.tsx b/src/frontend/src/components/EdictBoard.tsx
index d7c26c6..a841cba 100644
--- a/src/frontend/src/components/EdictBoard.tsx
+++ b/src/frontend/src/components/EdictBoard.tsx
@@ -416,7 +416,7 @@ export default function EdictBoard() {
       <div style={{ display: 'flex', alignItems: 'center', gap: 6, marginBottom: 8 }}>
         <select
           value={selectedProjectId || ''}
-          onChange={(e) => setSelectedProjectId(e.target.value || null)}
+          onChange={(e) => setSelectedProjectId(e.target.value || '')}
           style={{
             fontSize: 11, padding: '3px 8px', borderRadius: 6,
             border: '1px solid var(--line)', background: 'var(--panel)',