diff --git a/CHANGELOG.md b/CHANGELOG.md
index f656d6fc..6f8e68e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## v1.3.34 (2023-09-05)
+
+### Fixed
+
+- Fix issue in `apps.slack.tasks.populate_slack_channels_for_team` task by @joeyorlando ([#2969](https://github.com/grafana/oncall/pull/2969))
+
 ## v1.3.33 (2023-09-05)
 
 ### Fixed
diff --git a/engine/apps/slack/tasks.py b/engine/apps/slack/tasks.py
index ca746e31..d669be75 100644
--- a/engine/apps/slack/tasks.py
+++ b/engine/apps/slack/tasks.py
@@ -540,11 +540,9 @@ def populate_slack_channels_for_team(slack_team_identity_id: int, cursor: Option
         response, cursor, rate_limited = sc.paginated_api_call_with_ratelimit(
             "conversations_list",
             paginated_key="channels",
-            json={
-                "types": "public_channel,private_channel",
-                "limit": 1000,
-                "cursor": cursor,
-            },
+            types="public_channel,private_channel",
+            limit=1000,
+            cursor=cursor,
         )
     except SlackAPITokenException as e:
         logger.info(f"token revoked\n{e}")