diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index ebd7ebdba9..2b98138083 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{".":"4.2.0","packages/phoenix-evals":"0.9.2"}
+{".":"4.2.1","packages/phoenix-evals":"0.9.2"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad56d99201..793adabe86 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [4.2.1](https://github.com/Arize-ai/phoenix/compare/arize-phoenix-v4.2.0...arize-phoenix-v4.2.1) (2024-05-23)
+
+
+### Bug Fixes
+
+* **gql:** don't clear data if `read_only` ([#3291](https://github.com/Arize-ai/phoenix/issues/3291)) ([dbc3203](https://github.com/Arize-ai/phoenix/commit/dbc32035903a84b85fe3c97df80b8f4d4a3197db))
+
 ## [4.2.0](https://github.com/Arize-ai/phoenix/compare/arize-phoenix-v4.1.3...arize-phoenix-v4.2.0) (2024-05-23)
 
 
diff --git a/src/phoenix/version.py b/src/phoenix/version.py
index 0fd7811c0d..aef46acb47 100644
--- a/src/phoenix/version.py
+++ b/src/phoenix/version.py
@@ -1 +1 @@
-__version__ = "4.2.0"
+__version__ = "4.2.1"