diff --git a/app.py b/app.py
index 9243c97..482bbb4 100644
--- a/app.py
+++ b/app.py
@@ -128,11 +128,11 @@ for book in range(1, 67):
 
 @app.get("/js/shortcode.js")
 def serve_shortcode_js():
-    return cached.get("js_shortcode")
+    return Response(cached.get("js_shortcode"), mimetype='text/js')
 
 @app.get("/js/collapsible.js")
 def serve_collapsible_js():
-    return cached.get("js_collapsible")
+    return Response(cached.get("js_collapsible"), mimetype='text/js')
 
 def generate_short_id():
     remain = random.randrange(614_656, 17_210_367)  # resolves to length of 5