diff --git a/400-SOURCECODE/AIAHTML5.Web/Web.config b/400-SOURCECODE/AIAHTML5.Web/Web.config
index a0ae78c..23959be 100644
--- a/400-SOURCECODE/AIAHTML5.Web/Web.config
+++ b/400-SOURCECODE/AIAHTML5.Web/Web.config
@@ -41,6 +41,7 @@
       <remove fileExtension=".woff" />
       <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
       <mimeMap fileExtension=".mp3" mimeType="audio/mpeg" />
+      <mimeMap fileExtension=".vtt" mimeType="text/vtt"/>
       <!--<mimeMap fileExtension=".woff2" mimeType="application/font-woff2" />-->