diff --git a/src/js/select2/dropdown/attachBody.js b/src/js/select2/dropdown/attachBody.js
index 4f64fa9b..12d9ad1f 100644
--- a/src/js/select2/dropdown/attachBody.js
+++ b/src/js/select2/dropdown/attachBody.js
@@ -11,27 +11,11 @@ define([
   AttachBody.prototype.bind = function (decorated, container, $container) {
     var self = this;
 
-    var setupResultsEvents = false;
-
     decorated.call(this, container, $container);
 
     container.on('open', function () {
       self._showDropdown();
       self._attachPositioningHandler(container);
-
-      if (!setupResultsEvents) {
-        setupResultsEvents = true;
-
-        container.on('results:all', function () {
-          self._positionDropdown();
-          self._resizeDropdown();
-        });
-
-        container.on('results:append', function () {
-          self._positionDropdown();
-          self._resizeDropdown();
-        });
-      }
     });
 
     container.on('close', function () {
@@ -39,6 +23,26 @@ define([
       self._detachPositioningHandler(container);
     });
 
+    container.on('results:all', function () {
+      self._positionDropdown();
+      self._resizeDropdown();
+    });
+
+    container.on('results:append', function () {
+      self._positionDropdown();
+      self._resizeDropdown();
+    });
+
+    container.on('select', function () {
+      self._positionDropdown();
+      self._resizeDropdown();
+    });
+
+    container.on('unselect', function () {
+      self._positionDropdown();
+      self._resizeDropdown();
+    });
+
     this.$dropdownContainer.on('mousedown', function (evt) {
       evt.stopPropagation();
     });