diff --git a/index.html b/index.html
index 24d6ee1..4fca7d2 100644
--- a/index.html
+++ b/index.html
@@ -284,7 +284,7 @@
                         </div>
                         <div class="control">
                             <label for="imageScale">缩放</label>
-                            <input id="imageScale" type="range" min="70" max="220" value="100" step="1">
+                            <input id="imageScale" type="range" min="30" max="220" value="100" step="1">
                             <output class="value" for="imageScale">100%</output>
                         </div>
                         <div class="control">