diff --git a/app/javascript/src/styles/common/main_layout.scss b/app/javascript/src/styles/common/main_layout.scss
index 653db84dd..3761d59b4 100644
--- a/app/javascript/src/styles/common/main_layout.scss
+++ b/app/javascript/src/styles/common/main_layout.scss
@@ -37,7 +37,7 @@ footer#page-footer {
 
   #sidebar {
     flex: 0;
-    min-width: 15em;
+    min-width: 20em;
   }
 
   #content {
diff --git a/app/javascript/src/styles/specific/posts.scss b/app/javascript/src/styles/specific/posts.scss
index 84ee0833c..0cf733034 100644
--- a/app/javascript/src/styles/specific/posts.scss
+++ b/app/javascript/src/styles/specific/posts.scss
@@ -281,6 +281,7 @@ div#c-posts {
 
     input {
       min-width: 0;
+      flex: 1;
     }
 
     #search-box-submit {