diff --git a/README.md b/README.md
index d4b1874..75e6add 100644
--- a/README.md
+++ b/README.md
@@ -91,7 +91,7 @@ Scripts for supporting workflow automation that don’t really belong in any of
 - [notify-on-job-fail](scripts/notify-on-job-fail) - Send Slack message with details about failed workflow job on GitHub Actions and/or AWS Batch
 - [notify-on-job-start](scripts/notify-on-job-start) - Send Slack message with details about workflow job on GitHub Actions and/or AWS Batch
 - [notify-on-record-change](scripts/notify-on-record-change) - Send Slack message with details about line count changes for a file compared to an S3 object's metadata `recordcount`.
-  If the S3 object's metadata does not have `recordcount`, then will attempt to download S3 object to count lines locally, which only supports `xz` compressed S3 objects.
+  If the S3 object's metadata does not have `recordcount`, then will attempt to download S3 object to count lines locally, which only supports `zst` compressed S3 objects.
 - [notify-slack](scripts/notify-slack) - Send message or file to Slack
 - [s3-object-exists](scripts/s3-object-exists) - Used to prevent 404 errors during S3 file comparisons in the notify-* scripts
 - [trigger](scripts/trigger) - Triggers downstream GitHub Actions via the GitHub API using repository_dispatch events.
diff --git a/scripts/notify-on-record-change b/scripts/notify-on-record-change
index f424252..8502021 100755
--- a/scripts/notify-on-record-change
+++ b/scripts/notify-on-record-change
@@ -24,7 +24,7 @@ dst_record_count="$(aws s3api head-object --bucket "$bucket" --key "$key" --quer
 if [[ -z "$dst_record_count" ]]; then
   # This object doesn't have the record count stored as metadata
   # We have to download it and count the lines locally
-  dst_record_count="$(wc -l < <(aws s3 cp --no-progress "$dst" - | xz -T0 -dcfq))"
+  dst_record_count="$(wc -l < <(aws s3 cp --no-progress "$dst" - | zstd -T0 -dcq))"
 fi
 
 added_records="$(( src_record_count - dst_record_count ))"