diff --git a/release/release-notes/data-prepper.change-log-1.2.1.md b/release/release-notes/data-prepper.change-log-1.2.1.md
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+## 2021-12-21 Version 1.2.1
+
+---
+
+* __Updated THIRD-PARTY PARTY file and version to 1.2.1 (#769)__
+    [Asif Sohail Mohammed](mailto:nsifmoh@amazon.com) - Tue Dec 21 08:30:15 2021 -0600
+
+* __Fix boolean conversion and integer conversion bug for Logstash configuration converter attributes (#766) (#772)__
+    [Taylor Gray](mailto:33740195+graytaylor0@users.noreply.github.com) - Mon Dec 20 20:03:50 2021 -0600
+
+* __Upgrade to log4j 2.17, fixes CVE-2021-45105 (#764)__
+    [Steven Bayer](mailto:smbayer@amazon.com) - Mon Dec 20 13:43:16 2021 -0600
diff --git a/release/release-notes/data-prepper.release-notes-1.2.1.md b/release/release-notes/data-prepper.release-notes-1.2.1.md
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+## 2021-12-20 Version 1.2.1
+
+---
+
+### Bug Fixes
+* Fix boolean conversion and integer conversion bug for Logstash configuration converter attributes ([#766](https://github.com/opensearch-project/data-prepper/pull/766)), ([#772](https://github.com/opensearch-project/data-prepper/pull/772))
+
+### Maintenance
+* Uses Log4j 2.17.0 which fixes CVE-2021-45105 ([#764](https://github.com/opensearch-project/data-prepper/pull/764))
+* Updated THIRD-PARTY PARTY file and version to 1.2.1 ([#769](https://github.com/opensearch-project/data-prepper/pull/769))