diff --git a/src/data/talks/cnds2025.json b/src/data/talks/cnds2025.json
index 2427e9f..4a6c08d 100644
--- a/src/data/talks/cnds2025.json
+++ b/src/data/talks/cnds2025.json
@@ -249,7 +249,7 @@
     "talkDifficulty": "初級者",
     "talkCategory": "Networking",
     "onAir": false,
-    "documentUrl": "https://red.ht/CNDS2025_UDN",
+    "documentUrl": "https://speakerdeck.com/tsukaman/re-noudn-wocan-raemarutitenantomovmtong-he-mosi-inomamaxin-ji-neng-deqie-rituo-kuk8snetutowakunowei-lai",
     "conferenceDayId": 34,
     "conferenceDayDate": "2025-05-23",
     "presentationMethod": "現地登壇"