diff --git a/CHANGELOG.md b/CHANGELOG.md
index a25f704..6d6231f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Added
+### Changed
+### Removed
+
+## [4.2.0] - 2020-01-15
+### Added
 - Allow separate entrypoint/function type signature and definition, and pattern
   matching in left-hand sides:
   ```
@@ -28,6 +33,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ```
 ### Changed
 - FATE code generator improvements.
+- Bug fix: Handle qualified constructors in patterns.
+- Bug fix: Allow switching also on negative numbers.
 ### Removed
 
 ## [4.1.0] - 2019-11-26
@@ -185,12 +192,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Simplify calldata creation - instead of passing a compiled contract, simply
   pass a (stubbed) contract string.
 
-[Unreleased]: https://github.com/aeternity/aesophia/compare/v4.0.0...HEAD
+[Unreleased]: https://github.com/aeternity/aesophia/compare/v4.2.0...HEAD
+[4.2.0]: https://github.com/aeternity/aesophia/compare/v4.2.0...v4.1.0
+[4.1.0]: https://github.com/aeternity/aesophia/compare/v4.1.0...v4.0.0
 [4.0.0]: https://github.com/aeternity/aesophia/compare/v4.0.0...v3.2.0
-[4.0.0-rc5]: https://github.com/aeternity/aesophia/compare/v4.0.0-rc4...v4.0.0-rc5
-[4.0.0-rc4]: https://github.com/aeternity/aesophia/compare/v4.0.0-rc3...v4.0.0-rc4
-[4.0.0-rc3]: https://github.com/aeternity/aesophia/compare/v4.0.0-rc1...v4.0.0-rc3
-[4.0.0-rc1]: https://github.com/aeternity/aesophia/compare/v3.2.0...v4.0.0-rc1
 [3.2.0]: https://github.com/aeternity/aesophia/compare/v3.1.0...v3.2.0
 [3.1.0]: https://github.com/aeternity/aesophia/compare/v3.0.0...v3.1.0
 [3.0.0]: https://github.com/aeternity/aesophia/compare/v2.1.0...v3.0.0
diff --git a/rebar.config b/rebar.config
index 5297732..febec86 100644
--- a/rebar.config
+++ b/rebar.config
@@ -15,7 +15,7 @@
             {base_plt_apps, [erts, kernel, stdlib, crypto, mnesia]}
            ]}.
 
-{relx, [{release, {aesophia, "4.1.0"},
+{relx, [{release, {aesophia, "4.2.0"},
          [aesophia, aebytecode, getopt]},
 
         {dev_mode, true},
diff --git a/src/aesophia.app.src b/src/aesophia.app.src
index 4758c6e..d224976 100644
--- a/src/aesophia.app.src
+++ b/src/aesophia.app.src
@@ -1,6 +1,6 @@
 {application, aesophia,
  [{description, "Contract Language for aeternity"},
-  {vsn, "4.1.0"},
+  {vsn, "4.2.0"},
   {registered, []},
   {applications,
    [kernel,