diff --git a/public/styles/comps/upload-box.less b/public/styles/comps/upload-box.less
index 72b9a1159d..6d682de878 100644
--- a/public/styles/comps/upload-box.less
+++ b/public/styles/comps/upload-box.less
@@ -102,8 +102,7 @@
   width:var(--p-icon-button-size);
   height:var(--p-icon-button-size);
   font-size:var(--p-icon-button-size);
-  transition:var(--transition);
-  line-height:1; text-align:center; flex-shrink:0; cursor:pointer;
+  transition:0.2s; line-height:1; text-align:center; flex-shrink:0; cursor:pointer;
   >*::before{margin:0;}
   &.is-open { transform:rotate(180deg); }
   &.is-success { color:var(--config-color-success); }