diff --git a/web/thresholds.html b/web/thresholds.html
index 3c0a2321..8c66b13c 100644
--- a/web/thresholds.html
+++ b/web/thresholds.html
@@ -8,7 +8,7 @@
                     <div class="input-group-prepend">
                         <span class="input-group-text">1</span>
                     </div>
-                    <input class="form-control text-right" name="t0" type="number" min="5" max="255" step="1" value="{t0}"/>
+                    <input class="form-control text-right" name="t0" type="number" min="1" max="255" step="1" value="{t0}"/>
                     <div class="input-group-append">
                         <span class="input-group-text">kWh</span>
                     </div>