diff --git a/app/views/layouts/application.html.haml b/app/views/layouts/application.html.haml
index 4f4f2add983..89c7b14c473 100644
--- a/app/views/layouts/application.html.haml
+++ b/app/views/layouts/application.html.haml
@@ -1,7 +1,6 @@
 !!! 5
-%html
+%html{:lang => 'en'}
   %head
-    %meta{:content => 'text/html; charset=UTF-8', 'http-equiv' => 'Content-Type'}/
     %meta{:charset => 'utf-8'}/
     %meta{:name => 'viewport', :content => 'width=device-width, initial-scale=1'}/
     %meta{'http-equiv' => 'X-UA-Compatible', :content => 'IE=edge'}/
diff --git a/public/404.html b/public/404.html
index b612547fc21..514a935e23d 100644
--- a/public/404.html
+++ b/public/404.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
+  <meta charset="utf-8">
   <title>The page you were looking for doesn't exist (404)</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
   <style>
diff --git a/public/422.html b/public/422.html
index a21f82b3bdb..eb3601e71ab 100644
--- a/public/422.html
+++ b/public/422.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
+  <meta charset="utf-8">
   <title>The change you wanted was rejected (422)</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
   <style>
diff --git a/public/500.html b/public/500.html
index 061abc587dc..af46b8a5a1e 100644
--- a/public/500.html
+++ b/public/500.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
+  <meta charset="utf-8">
   <title>We're sorry, but something went wrong (500)</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
   <style>
