diff --git a/backend/src/routers/signvideo.py b/backend/src/routers/signvideo.py
index 4c65e08..b78b828 100644
--- a/backend/src/routers/signvideo.py
+++ b/backend/src/routers/signvideo.py
@@ -92,8 +92,8 @@ async def sign_video_thumbnail(
     # extract the thumbnail from the video
     bytes = extract_thumbnail(f"{settings.DATA_PATH}/{sign_video.path}")
 
-    return StreamingResponse(io.BytesIO(bytes), media_type="image/png")
-
+    # return the thumbnail and make it cacheable for 60 days
+    return StreamingResponse(io.BytesIO(bytes), media_type="image/jpeg", headers={"Cache-Control": "max-age=5184000"})
 
 @router.get("/{video_id}/", status_code=status.HTTP_200_OK)
 async def sign_video(
@@ -114,8 +114,8 @@ async def sign_video(
     if not sign_video:
         raise BaseException("Sign video not found")
 
-    # return the video
-    return FileResponse(f"{settings.DATA_PATH}/{sign_video.path}", media_type="video/mp4")
+    # return the video and make it cacheable for 60 days
+    return FileResponse(f"{settings.DATA_PATH}/{sign_video.path}", media_type="video/mp4", headers={"Cache-Control": "max-age=5184000"})
 
 
 class SignVideoUpdate(BaseModel):