diff --git a/pyproject.toml b/pyproject.toml
index c5b8832..ed2a839 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "hlink"
-version = "4.1.0"
+version = "4.2.0"
 description = "Fast supervised pyspark record linkage software"
 readme = "README.md"
 requires-python = ">=3.10"
@@ -55,7 +55,7 @@ hlink = "hlink.scripts.main:cli"
 Homepage = "https://github.com/ipums/hlink"
 Documentation = "https://hlink.docs.ipums.org"
 Repository = "https://github.com/ipums/hlink"
-Changelog = "https://github.com/ipums/hlink/releases"
+Changelog = "https://hlink.docs.ipums.org/changelog.html"
 
 [tool.setuptools.packages.find]
 where = ["."]
diff --git a/sphinx-docs/changelog.md b/sphinx-docs/changelog.md
index a5f261d..023b71a 100644
--- a/sphinx-docs/changelog.md
+++ b/sphinx-docs/changelog.md
@@ -3,7 +3,7 @@
 The format of this changelog is based on [Keep A Changelog][keep-a-changelog].
 Hlink adheres to semantic versioning as much as possible.
 
-## Not Yet Released
+## v4.2.0 (2025-04-29)
 
 ### Added
 
@@ -26,6 +26,9 @@ Hlink adheres to semantic versioning as much as possible.
 * Stabilized the XGBoost feature, since the integration provided by the xgboost
   Python package is no longer unstable. [PR #219][pr219]
 
+* Improved the error messages generated when a column mapping transform is
+  missing a required key. [PR #207][pr207]
+
 ### Deprecated
 
 * The `hlink.linking.core.transforms.apply_transform` function, which applies
@@ -33,6 +36,11 @@ Hlink adheres to semantic versioning as much as possible.
   `hlink.linking.core.column_mapping.apply_transform` instead.
   `column_mapping.apply_transform` supports the same interface. [PR #207][pr207]
 
+### Fixed
+
+* Fixed a bug where command-line hlink would sometimes crash if the command
+  history file was missing. [PR #215][pr215]
+
 ## v4.1.0 (2025-04-15)
 
 ### Added
@@ -427,6 +435,7 @@ and false negative data in model exploration. [PR #1][pr1]
 [pr207]: https://github.com/ipums/hlink/pull/207
 [pr212]: https://github.com/ipums/hlink/pull/212
 [pr213]: https://github.com/ipums/hlink/pull/213
+[pr215]: https://github.com/ipums/hlink/pull/215
 [pr219]: https://github.com/ipums/hlink/pull/219
 
 [household-matching-docs]: config.html#household-matching