diff --git a/src/Plugin/Interaction/MouseWheelZoom/js/mousewheelzoom.js b/src/Plugin/Interaction/MouseWheelZoom/js/mousewheelzoom.js
index 09cabed..5ead99e 100644
--- a/src/Plugin/Interaction/MouseWheelZoom/js/mousewheelzoom.js
+++ b/src/Plugin/Interaction/MouseWheelZoom/js/mousewheelzoom.js
@@ -1,6 +1,7 @@
 Drupal.openlayers.pluginManager.register({
   fs: 'openlayers.Interaction:MouseWheelZoom',
   init: function(data) {
+    data.opt.constrainResolution = true;
     return new ol.interaction.MouseWheelZoom(data.opt);
   }
 });
diff --git a/src/Plugin/Interaction/PinchZoom/js/pinchzoom.js b/src/Plugin/Interaction/PinchZoom/js/pinchzoom.js
index c75c6e0..c456ea6 100644
--- a/src/Plugin/Interaction/PinchZoom/js/pinchzoom.js
+++ b/src/Plugin/Interaction/PinchZoom/js/pinchzoom.js
@@ -1,6 +1,7 @@
 Drupal.openlayers.pluginManager.register({
   fs: 'openlayers.Interaction:PinchZoom',
   init: function(data) {
+    data.opt.constrainResolution = true;
     return new ol.interaction.PinchZoom(data.opt);
   }
 });