diff --git a/_sass/helpers.scss b/_sass/helpers.scss
index ee0399b..ccae670 100644
--- a/_sass/helpers.scss
+++ b/_sass/helpers.scss
@@ -37,14 +37,14 @@ $directions: (top, right, bottom, left);
 /// @example html
 ///   <div class="square-lg"></div>
     .square#{$infix} {
-      @extend .position-relative;
+      position: relative !important;
       padding-bottom: 100%;
 
       & > * {
-        @extend .position-absolute;
-        @extend .top-0;
-        @extend .left-0;
-        @extend .h-100;
+        position: absolute !important;
+        top: 0 !important;
+        left: 0 !important;
+        height: 100% !important;
       }
     }