diff --git a/src/transformers/channel.ts b/src/transformers/channel.ts
index 8ef1c0284..d0142a2dd 100644
--- a/src/transformers/channel.ts
+++ b/src/transformers/channel.ts
@@ -74,7 +74,7 @@ export function transformChannel(
     archived: payload.channel.thread_metadata?.archived,
     locked: payload.channel.thread_metadata?.locked,
     invitable: payload.channel.invitable,
-    createTimestamp: payload.channel.create_timestamp,
+    createTimestamp: payload.channel.create_timestamp ? Date.parse(payload.channel.create_timestamp) : undefined,
   };
 }
 
diff --git a/src/types/channels/channel.ts b/src/types/channels/channel.ts
index 08eceba10..8c2dfd6e0 100644
--- a/src/types/channels/channel.ts
+++ b/src/types/channels/channel.ts
@@ -63,5 +63,5 @@ export interface Channel {
   /** whether non-moderators can add other non-moderators to a thread; only available on private threads */
   invitable?: boolean;
   /** timestamp when the thread was created; only populated for threads created after 2022-01-09 */
-  createTimestamp?: number;
+  createTimestamp?: string;
 }