diff --git a/stylesheets/_conversation.scss b/stylesheets/_conversation.scss
index 48e31b2a8..8428421e8 100644
--- a/stylesheets/_conversation.scss
+++ b/stylesheets/_conversation.scss
@@ -14,8 +14,11 @@
 
 .conversation {
   background-color: $color-white;
-  height: 100%;
-  position: relative;
+  position: absolute;
+  top: 0;
+  right: 0;
+  left: 0;
+  bottom: 0;
 
   .panel {
     height: calc(100% - #{$header-height});
diff --git a/stylesheets/_index.scss b/stylesheets/_index.scss
index 8fe0e13eb..c9afe9e2c 100644
--- a/stylesheets/_index.scss
+++ b/stylesheets/_index.scss
@@ -4,6 +4,7 @@
 .gutter {
   height: 100%;
   overflow: hidden;
+  position: relative;
 }
 
 .expired {