diff --git a/resources/head.ui b/resources/head.ui
index ab424b8..9329acd 100644
--- a/resources/head.ui
+++ b/resources/head.ui
@@ -40,6 +40,7 @@
     <property name="page_increment">10</property>
   </object>
   <object class="GtkAdjustment" id="scale_adjustment">
+    <property name="lower">0.01</property>
     <property name="upper">99999</property>
     <property name="step_increment">0.1</property>
     <property name="page_increment">0.5</property>