diff --git a/js/src/dropdown.js b/js/src/dropdown.js
index e52c51e4db..48b8d62eab 100644
--- a/js/src/dropdown.js
+++ b/js/src/dropdown.js
@@ -151,7 +151,7 @@ class Dropdown {
        * Popper - https://popper.js.org
        */
       if (typeof Popper === 'undefined') {
-        throw new TypeError('Bootstrap dropdown require Popper.js (https://popper.js.org)')
+        throw new TypeError('Bootstrap\'s dropdowns require Popper.js (https://popper.js.org/)')
       }
 
       let referenceElement = this._element
diff --git a/js/src/tooltip.js b/js/src/tooltip.js
index 9510353a11..3d3130bb5b 100644
--- a/js/src/tooltip.js
+++ b/js/src/tooltip.js
@@ -113,7 +113,7 @@ class Tooltip {
      * Popper - https://popper.js.org
      */
     if (typeof Popper === 'undefined') {
-      throw new TypeError('Bootstrap tooltips require Popper.js (https://popper.js.org)')
+      throw new TypeError('Bootstrap\'s tooltips require Popper.js (https://popper.js.org/)')
     }
 
     // private