diff --git a/worker/src/Endpoint/Repl.hs b/worker/src/Endpoint/Repl.hs
index 2aded5d82..98ac7f0a6 100644
--- a/worker/src/Endpoint/Repl.hs
+++ b/worker/src/Endpoint/Repl.hs
@@ -49,6 +49,7 @@ allowedOrigins :: [String]
 allowedOrigins =
   [ "https://guide.elm-lang.org"
   , "https://guide.elm-lang.jp"
+  , "https://agj.github.io"
   , "http://localhost:8007"
   ]