diff --git a/manage/config-dialog.js b/manage/config-dialog.js
index c609d436..0661c333 100644
--- a/manage/config-dialog.js
+++ b/manage/config-dialog.js
@@ -164,7 +164,7 @@ function configDialog(style) {
       return;
     }
     saving = true;
-    return BG.usercssHelper.save(style)
+    return BG.usercssHelper.save(BG.deepCopy(style))
       .then(saved => {
         varsInitial = getInitialValues(deepCopy(saved.usercssData.vars));
         vars.forEach(va => onchange({target: va.input, justSaved: true}));
diff --git a/popup/popup.js b/popup/popup.js
index 9fb0fed6..f15ce92c 100644
--- a/popup/popup.js
+++ b/popup/popup.js
@@ -361,7 +361,7 @@ Object.assign(handleEvent, {
     if (styleIsUsercss) {
       getStylesSafe({id: styleId}).then(([style]) => {
         hotkeys.setState(false);
-        configDialog(style).then(() => {
+        configDialog(deepCopy(style)).then(() => {
           hotkeys.setState(true);
         });
       });