diff --git a/about/src/css/custom.css b/about/src/css/custom.css
index 01b3ef754fe..0fc6287b057 100755
--- a/about/src/css/custom.css
+++ b/about/src/css/custom.css
@@ -690,7 +690,7 @@ div[class*=' codeBlockTitle'] {
   font-size: 0.8rem !important;
   border-color: #444;
 }
-.repsonse-header {
+.response-header {
   border-radius: 0 0 4px 4px;
 }