diff --git a/public/404.html b/public/404.html
index f36936b..e91843c 100644
--- a/public/404.html
+++ b/public/404.html
@@ -16,8 +16,8 @@
           <h1 class="title is-size-1">404</h1>
           <h1 class="title is-size-5">The page you were looking for doesn't exist.</h1>
           <p>You may have mistyped the address or the page may have moved.</p>
-
-          <p>If you are the application owner check the logs for more information.</p>
+          <p>If you are the application owner check the logs for more information.</p><br><br>
+          <button class="button">Back to previous page</button>
         </div>
       </div>
     </div>
diff --git a/public/422.html b/public/422.html
index c08eac0..9c19266 100644
--- a/public/422.html
+++ b/public/422.html
@@ -1,67 +1,27 @@
 <!DOCTYPE html>
 <html>
+
 <head>
   <title>The change you wanted was rejected (422)</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
-  <style>
-  .rails-default-error-page {
-    background-color: #EFEFEF;
-    color: #2E2F30;
-    text-align: center;
-    font-family: arial, sans-serif;
-    margin: 0;
-  }
-
-  .rails-default-error-page div.dialog {
-    width: 95%;
-    max-width: 33em;
-    margin: 4em auto 0;
-  }
-
-  .rails-default-error-page div.dialog > div {
-    border: 1px solid #CCC;
-    border-right-color: #999;
-    border-left-color: #999;
-    border-bottom-color: #BBB;
-    border-top: #B00100 solid 4px;
-    border-top-left-radius: 9px;
-    border-top-right-radius: 9px;
-    background-color: white;
-    padding: 7px 12% 0;
-    box-shadow: 0 3px 8px rgba(50, 50, 50, 0.17);
-  }
-
-  .rails-default-error-page h1 {
-    font-size: 100%;
-    color: #730E15;
-    line-height: 1.5em;
-  }
-
-  .rails-default-error-page div.dialog > p {
-    margin: 0 0 1em;
-    padding: 1em;
-    background-color: #F7F7F7;
-    border: 1px solid #CCC;
-    border-right-color: #999;
-    border-left-color: #999;
-    border-bottom-color: #999;
-    border-bottom-left-radius: 4px;
-    border-bottom-right-radius: 4px;
-    border-top-color: #DADADA;
-    color: #666;
-    box-shadow: 0 3px 8px rgba(50, 50, 50, 0.17);
-  }
-  </style>
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.8.2/css/bulma.min.css">
 </head>
 
-<body class="rails-default-error-page">
+<body>
   <!-- This file lives in public/422.html -->
-  <div class="dialog">
-    <div>
-      <h1>The change you wanted was rejected.</h1>
-      <p>Maybe you tried to change something you didn't have access to.</p>
+  <div class="section">
+    <div class="columns ">
+      <div class="column is-half is-offset-one-quarter">
+        <div class="box has-text-centered">
+          <h1 class="title is-size-1">405</h1>
+          <h1 class="title is-size-5">The change you wanted was rejected.</h1>
+          <p>Maybe you tried to change something you didn't have access to.</p>
+          <p>If you are the application owner check the logs for more information.</p><br><br>
+          <button class="button">Back to previous page</button>
+        </div>
+      </div>
     </div>
-    <p>If you are the application owner check the logs for more information.</p>
   </div>
 </body>
-</html>
+
+</html>
\ No newline at end of file
diff --git a/public/500.html b/public/500.html
index 78a030a..51d671f 100644
--- a/public/500.html
+++ b/public/500.html
@@ -1,66 +1,26 @@
 <!DOCTYPE html>
 <html>
+
 <head>
   <title>We're sorry, but something went wrong (500)</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
-  <style>
-  .rails-default-error-page {
-    background-color: #EFEFEF;
-    color: #2E2F30;
-    text-align: center;
-    font-family: arial, sans-serif;
-    margin: 0;
-  }
-
-  .rails-default-error-page div.dialog {
-    width: 95%;
-    max-width: 33em;
-    margin: 4em auto 0;
-  }
-
-  .rails-default-error-page div.dialog > div {
-    border: 1px solid #CCC;
-    border-right-color: #999;
-    border-left-color: #999;
-    border-bottom-color: #BBB;
-    border-top: #B00100 solid 4px;
-    border-top-left-radius: 9px;
-    border-top-right-radius: 9px;
-    background-color: white;
-    padding: 7px 12% 0;
-    box-shadow: 0 3px 8px rgba(50, 50, 50, 0.17);
-  }
-
-  .rails-default-error-page h1 {
-    font-size: 100%;
-    color: #730E15;
-    line-height: 1.5em;
-  }
-
-  .rails-default-error-page div.dialog > p {
-    margin: 0 0 1em;
-    padding: 1em;
-    background-color: #F7F7F7;
-    border: 1px solid #CCC;
-    border-right-color: #999;
-    border-left-color: #999;
-    border-bottom-color: #999;
-    border-bottom-left-radius: 4px;
-    border-bottom-right-radius: 4px;
-    border-top-color: #DADADA;
-    color: #666;
-    box-shadow: 0 3px 8px rgba(50, 50, 50, 0.17);
-  }
-  </style>
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.8.2/css/bulma.min.css">
 </head>
 
-<body class="rails-default-error-page">
+<body>
   <!-- This file lives in public/500.html -->
-  <div class="dialog">
-    <div>
-      <h1>We're sorry, but something went wrong.</h1>
+  <div class="section">
+    <div class="columns ">
+      <div class="column is-half is-offset-one-quarter">
+        <div class="box has-text-centered">
+          <h1 class="title is-size-1">500</h1>
+          <h1 class="title is-size-5">We're sorry, but something went wrong.</h1>
+          <p>If you are the application owner check the logs for more information.</p><br><br>
+          <button class="button">Back to previous page</button>
+        </div>
+      </div>
     </div>
-    <p>If you are the application owner check the logs for more information.</p>
   </div>
-</body>
-</html>
+  </body>
+
+</html>
\ No newline at end of file
