diff --git "a/src/api/routes/channels/\043channel_id/tags.ts" "b/src/api/routes/channels/\043channel_id/tags.ts"
index 93769d6..a84e4b4 100644
--- "a/src/api/routes/channels/\043channel_id/tags.ts"
+++ "b/src/api/routes/channels/\043channel_id/tags.ts"
@@ -20,6 +20,7 @@
 import { Channel, ChannelUpdateEvent, emitEvent, Tag } from "@spacebar/util";
 import { Request, Response, Router } from "express";
 import { TagCreateSchema } from "@spacebar/schemas";
+import { HTTPError } from "#util/util/lambert-server";
 
 const router: Router = Router({ mergeParams: true });
 
@@ -68,6 +69,47 @@
     },
 );
 
+router.put(
+    "/:tag_id",
+    route({
+        requestBody: "TagCreateSchema",
+        permission: "MANAGE_CHANNELS",
+        responses: {
+            200: {
+                body: "Channel",
+            },
+            404: {},
+        },
+    }),
+    async (req: Request, res: Response) => {
+        const body = req.body as TagCreateSchema;
+        const { channel_id, tag_id } = req.params as Record<string, string>;
+
+        const channel = await Channel.findOneOrFail({
+            where: { id: channel_id },
+            relations: ["available_tags"],
+        });
+
+        if (!channel.isForum()) throw new Error("is not thread only channel");
+
+        const tag = channel.available_tags?.find((tag) => tag.id == tag_id);
+        //TODO better error
+        if (!tag) throw new HTTPError("Tag not found");
+        tag.assign(body);
+
+        await Promise.all([
+            tag.save(),
+            emitEvent({
+                event: "CHANNEL_UPDATE",
+                data: channel.toJSON(),
+                channel_id,
+            } as ChannelUpdateEvent),
+        ]);
+
+        res.json(channel.toJSON());
+    },
+);
+
 router.delete(
     "/:tag_id",
     route({