diff --git a/spring-graphql/src/main/resources/graphiql/index.html b/spring-graphql/src/main/resources/graphiql/index.html
index 9fe053e7..2a56a182 100644
--- a/spring-graphql/src/main/resources/graphiql/index.html
+++ b/spring-graphql/src/main/resources/graphiql/index.html
@@ -1,6 +1,8 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>GraphiQL</title>
     <style>
         body {
