diff --git a/index.html b/index.html
index c5ff6724..cb29d687 100644
--- a/index.html
+++ b/index.html
@@ -7817,7 +7817,7 @@
     <script src="modules/ui/stylePresets.js"></script>
 
     <script src="modules/ui/general.js?v=1.87.00"></script>
-    <script src="modules/ui/options.js?v=1.87.00"></script>
+    <script src="modules/ui/options.js?v=1.87.09"></script>
     <script src="main.js"></script>
 
     <script defer src="modules/relief-icons.js"></script>
diff --git a/modules/ui/options.js b/modules/ui/options.js
index 0683a694..47cbf60c 100644
--- a/modules/ui/options.js
+++ b/modules/ui/options.js
@@ -461,8 +461,13 @@ function changeDialogsTheme(themeColor, transparency) {
 }
 
 function changeZoomExtent(value) {
+  if(+zoomExtentMin.value > +zoomExtentMax.value) {
+    [zoomExtentMin.value, zoomExtentMax.value]=[zoomExtentMax.value, zoomExtentMin.value];
+  }
   const min = Math.max(+zoomExtentMin.value, 0.01);
   const max = Math.min(+zoomExtentMax.value, 200);
+  zoomExtentMin.value = min;
+  zoomExtentMax.value = max;
   zoom.scaleExtent([min, max]);
   const scale = minmax(+value, 0.01, 200);
   zoom.scaleTo(svg, scale);
diff --git a/versioning.js b/versioning.js
index 80db2aac..e8667969 100644
--- a/versioning.js
+++ b/versioning.js
@@ -1,7 +1,7 @@
 "use strict";
 
 // version and caching control
-const version = "1.87.08"; // generator version, update each time
+const version = "1.87.09"; // generator version, update each time
 
 {
   document.title += " v" + version;