diff --git a/src/Microsoft.AspNetCore.Blazor.Build/targets/Standalone.Web.config b/src/Microsoft.AspNetCore.Blazor.Build/targets/Standalone.Web.config
index a25a3fb3e0..d947652aa2 100644
--- a/src/Microsoft.AspNetCore.Blazor.Build/targets/Standalone.Web.config
+++ b/src/Microsoft.AspNetCore.Blazor.Build/targets/Standalone.Web.config
@@ -4,6 +4,7 @@
     <staticContent>
       <remove fileExtension=".dll" />
       <mimeMap fileExtension=".dll" mimeType="application/octet-stream" />
+      <mimeMap fileExtension=".json" mimeType="application/json" />
       <mimeMap fileExtension=".wasm" mimeType="application/wasm" />
     </staticContent>
     <httpCompression>