diff --git a/cmd/cloud-run/slack-message-sender/slack-message-sender.py b/cmd/cloud-run/slack-message-sender/slack-message-sender.py
index c63b639a5d2a..03b274f710f8 100755
--- a/cmd/cloud-run/slack-message-sender/slack-message-sender.py
+++ b/cmd/cloud-run/slack-message-sender/slack-message-sender.py
@@ -347,7 +347,7 @@ def issue_labeled() -> Response:
                     username="GithubBot",
                     unfurl_links=True,
                     unfurl_media=True,
-                    link_names=1,
+                    link_names=True,
                     blocks=[
                         {
                             "type": "context",