diff --git a/src/index.html b/src/index.html
index 8bdbf6ae..810b58ba 100644
--- a/src/index.html
+++ b/src/index.html
@@ -1145,7 +1145,7 @@
               <hr>
               <div class="input-wrap">
                 <label for="control-theme-radius">Radius</label>
-                <input id="control-theme-radius" class="control-theme-radius" type="range" min="0" max="300" value="0" step="20" tabindex="-1">
+                <input id="control-theme-radius" class="control-theme-radius" type="range" min="0" max="300" value="0" step="10" tabindex="-1">
               </div>
               <div class="button-wrap">
                 <button class="control-theme-radius-default button mb-0" tabindex="-1">Default radius</button>