diff --git a/app/views/submissions/index.html.haml b/app/views/submissions/index.html.haml
--- a/app/views/submissions/index.html.haml
+++ b/app/views/submissions/index.html.haml
@@ -1,14 +1,16 @@
-.panel.panel-info
-  .panel-heading
+.card.border-info.mb-2
+  .card-header.text-bg-info.border-info
     Select Problems
-  .panel-body
-    .form-inline
-      = select 'submission',
-        'problem_id',
-        @problems.collect {|p| ["[#{p.name}] #{p.full_name}", problem_submissions_url(p.id)]},
-        { selected: (@problem ? problem_submissions_url(@problem) : -1) },
-        { class: 'select2 form-control'} 
-      %button.btn.btn-primary.btn-sm.go-button#problem_go{data: {source: '#submission_problem_id'}} Go
+  .card-body
+    .row
+      .col-6
+        = select 'submission',
+          'problem_id',
+          @problems.collect {|p| ["[#{p.name}] #{p.full_name}", problem_submissions_url(p.id)]},
+          { selected: (@problem ? problem_submissions_url(@problem) : -1) },
+          { class: 'select2 form-control'}
+      .col-6
+        %a.btn.btn-primary.go-button#problem_go{data: {source: '#submission_problem_id'}} Go
 
 - if @problem!=nil
   %h2= "Task: #{@problem.full_name} (#{@problem.name})"