diff --git a/tabs/configuration.html b/tabs/configuration.html
index 7d7783e4..5b68d622 100644
--- a/tabs/configuration.html
+++ b/tabs/configuration.html
@@ -179,7 +179,7 @@
         </div>
         <div class="number">
             <label>
-                <input type="number" name="voltagescale" step="1" min="10" max="200" />
+                <input type="number" name="voltagescale" step="1" min="10" max="255" />
                 <span i18n="configurationBatteryScale"></span>
             </label>
         </div>