_sass/minimal-mistakes/_footer.scss

@@ -9,6 +9,11 @@
   margin-right: 0;
   width: 100%;
   clear: both;
+  /* sticky footer fix start */
+  position: absolute;
+  bottom: 0;
+  height: auto;
+  /* sticky footer fix end */
   margin-top: 3em;
   color: $muted-text-color;
   -webkit-animation: $intro-transition;

_sass/minimal-mistakes/_page.scss

@@ -19,22 +19,6 @@
   }
 }
 
-body {
-  display: -webkit-box;
-  display: -ms-flexbox;
-  display: flex;
-  min-height: 100vh;
-  -webkit-box-orient: vertical;
-  -webkit-box-direction: normal;
-  -ms-flex-direction: column;
-          flex-direction: column;
-}
-
-.initial-content,
-.search-content {
-  flex: 1 0 auto;
-}
-
 .page {
   @include breakpoint($large) {
     float: right;

assets/js/_main.js

@@ -3,6 +3,18 @@
    ========================================================================== */
 
 $(document).ready(function() {
+  // Sticky footer
+  var bumpIt = function() {
+    $("body").css("margin-bottom", $(".page__footer").outerHeight(true));
+  };
+
+  bumpIt();
+  $(window).resize(
+    jQuery.throttle(250, function() {
+      bumpIt();
+    })
+  );
+
   // FitVids init
   $("#main").fitVids();