diff --git a/scss/_dropdown.scss b/scss/_dropdown.scss
index 7826e02121..981a17cb86 100644
--- a/scss/_dropdown.scss
+++ b/scss/_dropdown.scss
@@ -114,11 +114,11 @@
 // menu with the parent.
 .dropdown-menu-right {
   right: 0;
-  left: auto; // Reset the default from `.dropdown-menu`
+  left: auto !important; // Reset the default from `.dropdown-menu`
 }
 
 .dropdown-menu-left {
-  right: auto;
+  right: auto !important;
   left: 0;
 }