diff --git a/static/css/application.css b/static/css/application.css
index 55ec0430a2..ff3c3e93e0 100644
--- a/static/css/application.css
+++ b/static/css/application.css
@@ -734,7 +734,7 @@ li.calc-main {
   -ms-transition-delay: 0;
   -o-transition-delay: 0;
   transition-delay: 0;
-  z-index: 9999;
+  z-index: 99;
   -webkit-appearance: none; }
 li.calc-main.open {
   bottom: -36px; }
diff --git a/templates/sass/layout/_calculator.scss b/templates/sass/layout/_calculator.scss
index 80f088f635..5077bce3a0 100644
--- a/templates/sass/layout/_calculator.scss
+++ b/templates/sass/layout/_calculator.scss
@@ -4,7 +4,7 @@ li.calc-main {
   position: fixed;
   width: 100%;
   @include transition(bottom);
-  z-index: 9999;
+  z-index: 99;
   -webkit-appearance: none;
 
   &.open {