diff --git a/frontend/Web/show.html b/frontend/Web/show.html
index cc6c3a0..fe570fd 100644
--- a/frontend/Web/show.html
+++ b/frontend/Web/show.html
@@ -103,7 +103,7 @@
           <option value="author">Author</option>
           <option value="keyword">Keyword</option>
         </select>
-        <input type="text" id="searchInput" placeholder="Enter search term">
+        <input type="text" id="searchInput" placeholder="Enter search term" required>
         <button onclick="performSearch()">Search</button>
       </div>
       <div id="searchResults"></div>