diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba7583f..42b87b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## v0.2.1 [2024-02-28]
+
+_Bug fixes_
+
+- Fixed the type mismatch of the input parameter in the `get_channel_history` pipeline. ([#20](https://github.com/turbot/flowpipe-mod-slack/pull/20))
+
 ## v0.2.0 [2024-02-07]
 
 _What's new?_
@@ -12,4 +18,4 @@ _Bug fixes_
 
 _What's new?_
 
-- Added 15+ pipelines to make it easy to connect your Channel, Chat, User resources and more. For usage information and a full list of pipelines, please see [Slack Mod for Flowpipe](https://hub.flowpipe.io/mods/turbot/slack).
\ No newline at end of file
+- Added 15+ pipelines to make it easy to connect your Channel, Chat, User resources and more. For usage information and a full list of pipelines, please see [Slack Mod for Flowpipe](https://hub.flowpipe.io/mods/turbot/slack).
diff --git a/pipelines/channel/get_channel_history.fp b/pipelines/channel/get_channel_history.fp
index 1118b57..b3a89d1 100644
--- a/pipelines/channel/get_channel_history.fp
+++ b/pipelines/channel/get_channel_history.fp
@@ -16,7 +16,7 @@ pipeline "get_channel_history" {
   param "oldest" {
     type        = string
     description = "Only messages after this Unix timestamp will be included in results."
-    default     = 0
+    default     = "0"
   }
 
   step "http" "get_channel_history" {