diff --git a/packages/client/src/components/MkUrlPreview.vue b/packages/client/src/components/MkUrlPreview.vue
index f649405479..9241c49c36 100644
--- a/packages/client/src/components/MkUrlPreview.vue
+++ b/packages/client/src/components/MkUrlPreview.vue
@@ -135,7 +135,7 @@ const embedId = `embed${Math.random().toString().replace(/\D/, "")}`;
 let tweetHeight = ref(150);
 
 const requestUrl = new URL(props.url);
-if (!["http:", "https:", "gopher:", "gemini:", "matrix:", "ipfs:", "ipns:", "finger:"].includes(requestUrl.protocol))
+if (!["http:", "https:", "gopher:", "gemini:", "matrix:", "ipfs:", "ipns:", "finger:"].includes(requestUrl.protocol) && !requestUrl.protocol.startsWith("web+"))
 	throw new Error("invalid url");
 
 if (
diff --git a/packages/client/src/components/global/MkUrl.vue b/packages/client/src/components/global/MkUrl.vue
index 75be6ccd07..e44e980054 100644
--- a/packages/client/src/components/global/MkUrl.vue
+++ b/packages/client/src/components/global/MkUrl.vue
@@ -46,7 +46,9 @@ const props = defineProps<{
 
 const self = props.url.startsWith(local);
 const url = parseUri(props.url);
-if (!["http", "https", "gopher", "gemini", "matrix", "ipfs", "ipns", "finger"].includes(url.scheme)) throw new Error("invalid url");
+if (!["http", "https", "gopher", "gemini", "matrix", "ipfs", "ipns", "finger"].includes(url.scheme) && !url.scheme.startsWith("web+"))
+	throw new Error("invalid url");
+
 const el = ref();
 
 useTooltip(el, (showing) => {
diff --git a/packages/client/src/scripts/parse-uri.ts b/packages/client/src/scripts/parse-uri.ts
index 2c25766a34..3408c5f078 100644
--- a/packages/client/src/scripts/parse-uri.ts
+++ b/packages/client/src/scripts/parse-uri.ts
@@ -6,7 +6,7 @@ export function parseUri(uri: string): {
 	fragment: string | null;
 } {
 	const urlParts = uri.match(
-		/^(\w+):(\/\/)?([^/?#]*)(\/([^?#]*))?(\?([^#]*))?(#(.*))?$/,
+		/^([\w+]+):(\/\/)?([^/?#]*)(\/([^?#]*))?(\?([^#]*))?(#(.*))?$/,
 	);
 
 	if (!urlParts) {
diff --git a/packages/ffm-js/src/internal/parser.ts b/packages/ffm-js/src/internal/parser.ts
index 4af12ce573..3dc186c4cb 100644
--- a/packages/ffm-js/src/internal/parser.ts
+++ b/packages/ffm-js/src/internal/parser.ts
@@ -674,7 +674,7 @@ export const language = P.createLanguage({
 		]));
 		const parser = P.seq([
 			notLinkLabel,
-			P.regexp(/((https?)|(gemini)|(gopher)|(matrix)|(ipns)|(ipfs)):\/\//),
+			P.regexp(/((https?)|(gemini)|(gopher)|(matrix)|(ipns)|(ipfs)|(finger)|(web\+\w+)):\/\//),
 			innerItem.many(1).text(),
 		]);
 		return new P.Parser<M.MfmUrl | string>((input, index, state) => {
@@ -706,7 +706,7 @@ export const language = P.createLanguage({
 		const parser = P.seq([
 			notLinkLabel,
 			open,
-			P.regexp(/((https?)|(gemini)|(gopher)|(matrix)|(ipns)|(ipfs)):\/\//),
+			P.regexp(/((https?)|(gemini)|(gopher)|(matrix)|(ipns)|(ipfs)|(finger)|(web\+\w+)):\/\//),
 			P.seq([P.notMatch(P.alt([close, space])), P.char], 1).many(1),
 			close,
 		]).text();