diff --git a/js/popover.js b/js/popover.js
index 7f606f8..ba25248 100644
--- a/js/popover.js
+++ b/js/popover.js
@@ -60,6 +60,13 @@ var Drupal = Drupal || {};
               $currentPopover = null;
             }
           })
+          .keyup(function (event) {
+            // Close popup when ESC is pressed.
+            if (event.which === 27) {
+              $currentPopover.popover('hide');
+              $currentPopover = null;
+            }
+          })
         ;
       }