diff --git a/stylesheets/_index.scss b/stylesheets/_index.scss
index 63ca09e4a9d6..e5eb922292ed 100644
--- a/stylesheets/_index.scss
+++ b/stylesheets/_index.scss
@@ -18,7 +18,10 @@
 
 .gutter {
   float: left;
-  max-width: 300px;
+  width: 300px;
+  .conversations {
+    width: 100%;
+  }
 }
 
 .socket-status {
diff --git a/stylesheets/manifest.css b/stylesheets/manifest.css
index c409f71a0f9a..d2556ce9e7b3 100644
--- a/stylesheets/manifest.css
+++ b/stylesheets/manifest.css
@@ -357,7 +357,9 @@ img.emoji {
 
 .gutter {
   float: left;
-  max-width: 300px; }
+  width: 300px; }
+  .gutter .conversations {
+    width: 100%; }
 
 .socket-status {
   padding: 6px;