diff --git a/src/d2m/converters/message-to-event.embeds.test.js b/src/d2m/converters/message-to-event.embeds.test.js
index ef7e9b8d..4d766243 100644
--- a/src/d2m/converters/message-to-event.embeds.test.js
+++ b/src/d2m/converters/message-to-event.embeds.test.js
@@ -67,7 +67,7 @@ test("message2event embeds: image embed and attachment", async t => {
 		msgtype: "m.image",
 		url: "mxc://cadence.moe/zAXdQriaJuLZohDDmacwWWDR",
 		body: "Screenshot_20231001_034036.jpg",
-		external_url: "https://cdn.discordapp.com/attachments/176333891320283136/1157854643037163610/Screenshot_20231001_034036.jpg?ex=651a1faa&is=6518ce2a&hm=eb5ca80a3fa7add8765bf404aea2028a28a2341e4a62435986bcdcf058da82f3&",
+		external_url: "https://bridge.example.org/download/discordcdn/176333891320283136/1157854643037163610/Screenshot_20231001_034036.jpg",
 		filename: "Screenshot_20231001_034036.jpg",
 		info: {
 			h: 1170,
diff --git a/src/d2m/converters/message-to-event.js b/src/d2m/converters/message-to-event.js
index 195bdddb..73106cd8 100644
--- a/src/d2m/converters/message-to-event.js
+++ b/src/d2m/converters/message-to-event.js
@@ -103,7 +103,7 @@ const embedTitleParser = markdown.markdownEngine.parserFor({
  * @param {DiscordTypes.APIAttachment} attachment
  */
 async function attachmentToEvent(mentions, attachment) {
-	const publicURL = dUtils.getPublicUrlForCdn(attachment.url)
+	const external_url = dUtils.getPublicUrlForCdn(attachment.url)
 	const emoji =
 		attachment.content_type?.startsWith("image/jp") ? "📸"
 		: attachment.content_type?.startsWith("image/") ? "🖼️"
@@ -117,9 +117,9 @@ async function attachmentToEvent(mentions, attachment) {
 			$type: "m.room.message",
 			"m.mentions": mentions,
 			msgtype: "m.text",
-			body: `${emoji} Uploaded SPOILER file: ${publicURL} (${pb(attachment.size)})`,
+			body: `${emoji} Uploaded SPOILER file: ${external_url} (${pb(attachment.size)})`,
 			format: "org.matrix.custom.html",
-			formatted_body: `<blockquote>${emoji} Uploaded SPOILER file: <a href="${publicURL}">${publicURL}</a> (${pb(attachment.size)})</blockquote>`
+			formatted_body: `<blockquote>${emoji} Uploaded SPOILER file: <a href="${external_url}">${external_url}</a> (${pb(attachment.size)})</blockquote>`
 		}
 	}
 	// for large files, always link them instead of uploading so I don't use up all the space in the content repo
@@ -128,9 +128,9 @@ async function attachmentToEvent(mentions, attachment) {
 			$type: "m.room.message",
 			"m.mentions": mentions,
 			msgtype: "m.text",
-			body: `${emoji} Uploaded file: ${publicURL} (${pb(attachment.size)})`,
+			body: `${emoji} Uploaded file: ${external_url} (${pb(attachment.size)})`,
 			format: "org.matrix.custom.html",
-			formatted_body: `${emoji} Uploaded file: <a href="${publicURL}">${attachment.filename}</a> (${pb(attachment.size)})`
+			formatted_body: `${emoji} Uploaded file: <a href="${external_url}">${attachment.filename}</a> (${pb(attachment.size)})`
 		}
 	} else if (attachment.content_type?.startsWith("image/") && attachment.width && attachment.height) {
 		return {
@@ -138,7 +138,7 @@ async function attachmentToEvent(mentions, attachment) {
 			"m.mentions": mentions,
 			msgtype: "m.image",
 			url: await file.uploadDiscordFileToMxc(attachment.url),
-			external_url: attachment.url,
+			external_url,
 			body: attachment.description || attachment.filename,
 			filename: attachment.filename,
 			info: {
@@ -154,7 +154,7 @@ async function attachmentToEvent(mentions, attachment) {
 			"m.mentions": mentions,
 			msgtype: "m.video",
 			url: await file.uploadDiscordFileToMxc(attachment.url),
-			external_url: attachment.url,
+			external_url,
 			body: attachment.description || attachment.filename,
 			filename: attachment.filename,
 			info: {
@@ -170,7 +170,7 @@ async function attachmentToEvent(mentions, attachment) {
 			"m.mentions": mentions,
 			msgtype: "m.audio",
 			url: await file.uploadDiscordFileToMxc(attachment.url),
-			external_url: attachment.url,
+			external_url,
 			body: attachment.description || attachment.filename,
 			filename: attachment.filename,
 			info: {
@@ -185,7 +185,7 @@ async function attachmentToEvent(mentions, attachment) {
 			"m.mentions": mentions,
 			msgtype: "m.file",
 			url: await file.uploadDiscordFileToMxc(attachment.url),
-			external_url: attachment.url,
+			external_url,
 			body: attachment.description || attachment.filename,
 			filename: attachment.filename,
 			info: {
@@ -197,8 +197,8 @@ async function attachmentToEvent(mentions, attachment) {
 }
 
 /**
- * @param {import("discord-api-types/v10").APIMessage} message
- * @param {import("discord-api-types/v10").APIGuild} guild
+ * @param {DiscordTypes.APIMessage} message
+ * @param {DiscordTypes.APIGuild} guild
  * @param {{includeReplyFallback?: boolean, includeEditFallbackStar?: boolean}} options default values:
  * - includeReplyFallback: true
  * - includeEditFallbackStar: false
diff --git a/src/d2m/converters/message-to-event.test.js b/src/d2m/converters/message-to-event.test.js
index 7213bb8e..115d99ad 100644
--- a/src/d2m/converters/message-to-event.test.js
+++ b/src/d2m/converters/message-to-event.test.js
@@ -337,7 +337,7 @@ test("message2event: attachment with no content", async t => {
 		msgtype: "m.image",
 		url: "mxc://cadence.moe/qXoZktDqNtEGuOCZEADAMvhM",
 		body: "image.png",
-		external_url: "https://cdn.discordapp.com/attachments/497161332244742154/1124628646431297546/image.png",
+		external_url: "https://bridge.example.org/download/discordcdn/497161332244742154/1124628646431297546/image.png",
 		filename: "image.png",
 		info: {
 			mimetype: "image/png",
@@ -373,7 +373,7 @@ test("message2event: stickers", async t => {
 		msgtype: "m.image",
 		url: "mxc://cadence.moe/ZDCNYnkPszxGKgObUIFmvjus",
 		body: "image.png",
-		external_url: "https://cdn.discordapp.com/attachments/122155380120748034/1106366167486038016/image.png",
+		external_url: "https://bridge.example.org/download/discordcdn/122155380120748034/1106366167486038016/image.png",
 		filename: "image.png",
 		info: {
 			mimetype: "image/png",
@@ -427,7 +427,7 @@ test("message2event: skull webp attachment with content", async t => {
 			mimetype: "image/webp",
 			size: 74290
 		},
-		external_url: "https://cdn.discordapp.com/attachments/112760669178241024/1128084747910918195/skull.webp",
+		external_url: "https://bridge.example.org/download/discordcdn/112760669178241024/1128084747910918195/skull.webp",
 		filename: "skull.webp",
 		url: "mxc://cadence.moe/sDxWmDErBhYBxtDcJQgBETes"
 	}])
@@ -461,7 +461,7 @@ test("message2event: reply to skull webp attachment with content", async t => {
 			mimetype: "image/jpeg",
 			size: 85906
 		},
-		external_url: "https://cdn.discordapp.com/attachments/112760669178241024/1128084851023675515/RDT_20230704_0936184915846675925224905.jpg",
+		external_url: "https://bridge.example.org/download/discordcdn/112760669178241024/1128084851023675515/RDT_20230704_0936184915846675925224905.jpg",
 		filename: "RDT_20230704_0936184915846675925224905.jpg",
 		url: "mxc://cadence.moe/WlAbFSiNRIHPDEwKdyPeGywa"
 	}])
@@ -551,7 +551,7 @@ test("message2event: reply with a video", async t => {
 		body: "Ins_1960637570.mp4",
 		filename: "Ins_1960637570.mp4",
 		url: "mxc://cadence.moe/kMqLycqMURhVpwleWkmASpnU",
-		external_url: "https://cdn.discordapp.com/attachments/112760669178241024/1197621094786531358/Ins_1960637570.mp4?ex=65bbee8f&is=65a9798f&hm=ae14f7824c3d526c5e11c162e012e1ee405fd5776e1e9302ed80ccd86503cfda&",
+		external_url: "https://bridge.example.org/download/discordcdn/112760669178241024/1197621094786531358/Ins_1960637570.mp4",
 		info: {
 			h: 854,
 			mimetype: "video/mp4",
@@ -572,7 +572,7 @@ test("message2event: voice message", async t => {
 	t.deepEqual(events, [{
 		$type: "m.room.message",
       body: "voice-message.ogg",
-      external_url: "https://cdn.discordapp.com/attachments/1099031887500034088/1112476845502365786/voice-message.ogg?ex=65c92d4c&is=65b6b84c&hm=0654bab5027474cbe23875954fa117cf44d8914c144cd151879590fa1baf8b1c&",
+      external_url: "https://bridge.example.org/download/discordcdn/1099031887500034088/1112476845502365786/voice-message.ogg",
       filename: "voice-message.ogg",
       info: {
         duration: 3960.0000381469727,
@@ -595,7 +595,7 @@ test("message2event: misc file", async t => {
 	}, {
 		$type: "m.room.message",
       body: "the.yml",
-      external_url: "https://cdn.discordapp.com/attachments/122155380120748034/1174514575220158545/the.yml?ex=65cd6270&is=65baed70&hm=8c5f1b571784e3c7f99628492298815884e351ae0dc7c2ae40dd22d97caf27d9&",
+      external_url: "https://bridge.example.org/download/discordcdn/122155380120748034/1174514575220158545/the.yml",
       filename: "the.yml",
 		info: {
 			mimetype: "text/plain; charset=utf-8",