diff --git a/docs/assets/js/_src/application.js b/docs/assets/js/_src/application.js
index 9ebba13fe5..2566298b86 100644
--- a/docs/assets/js/_src/application.js
+++ b/docs/assets/js/_src/application.js
@@ -69,7 +69,7 @@
 
     // tooltip demo
     $('.tooltip-demo').tooltip({
-      selector: '[data-toggle=tooltip]',
+      selector: '[data-toggle="tooltip"]',
       container: 'body'
     })
 
@@ -77,7 +77,7 @@
     $('.popover-test').popover()
 
     $('.bs-docs-navbar').tooltip({
-      selector: 'a[data-toggle=tooltip]',
+      selector: 'a[data-toggle="tooltip"]',
       container: '.bs-docs-navbar .nav'
     })