diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 9965a341..d4f6f299 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.3.0"
+  ".": "3.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4ee724a..d81a3dbc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## [3.0.0](https://github.com/krystal/katapult-php/compare/v2.3.0...v3.0.0) (2024-01-19)
+
+
+### ⚠ BREAKING CHANGES
+
+* **openapi:** v3
+
+### Features
+
+* **openapi:** v3 ([b9f90bf](https://github.com/krystal/katapult-php/commit/b9f90bf697ae941b8dc9f756ce8ff2a8b39c5ada))
+
+
+### Miscellaneous Chores
+
+* **CI:** specify all 3 release branches for release-please ([a33d1b2](https://github.com/krystal/katapult-php/commit/a33d1b27ccdc4e1f61692a28298c07710751ebf4))
+* **CI:** update target branch ([a450cc9](https://github.com/krystal/katapult-php/commit/a450cc9596c99393d1249a2f5d3ccca372afdc71))
+* **docs:** provide usage example ([d2751bd](https://github.com/krystal/katapult-php/commit/d2751bd377000e1a1289d555fb0932083707d7b6))
+* **release-please:** add v3 to targeted branches ([a3a39d9](https://github.com/krystal/katapult-php/commit/a3a39d9552dce302b1dc0c55ac06969e666ede26))
+* **release-please:** update to newest GHA release-please version ([72db4de](https://github.com/krystal/katapult-php/commit/72db4de16985319433b43f81a9fda837e75e73d5))
+* **release-please:** versioning ([b861b71](https://github.com/krystal/katapult-php/commit/b861b7186425c83f881cdfb59f067a4549590e12))
+
 ## [2.3.0](https://github.com/krystal/katapult-php/compare/v2.2.0...v2.3.0) (2023-05-19)
 
 
diff --git a/VERSION b/VERSION
index 197c4d5c..4a36342f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.4.0
+3.0.0