diff --git a/app/templates/admin/voting.html b/app/templates/admin/voting.html
index 3963d8b..a425c17 100644
--- a/app/templates/admin/voting.html
+++ b/app/templates/admin/voting.html
@@ -27,14 +27,18 @@
             <div class="time-row">
                 <div class="time-field">
                     <label>Hora de inicio</label>
-                    <input type="time" name="start_time" class="input"
-                           value="{{ config.start_time }}" required>
+                    <input type="text" name="start_time" class="input"
+                           value="{{ config.start_time }}"
+                           placeholder="HH:MM" pattern="[0-2][0-9]:[0-5][0-9]"
+                           maxlength="5" required>
                 </div>
                 <div class="time-sep">—</div>
                 <div class="time-field">
                     <label>Hora de fin</label>
-                    <input type="time" name="end_time" class="input"
-                           value="{{ config.end_time }}" required>
+                    <input type="text" name="end_time" class="input"
+                           value="{{ config.end_time }}"
+                           placeholder="HH:MM" pattern="[0-2][0-9]:[0-5][0-9]"
+                           maxlength="5" required>
                 </div>
             </div>