diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7aa6d011..de36a66e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,39 @@
 # Changelog
 
+## [0.18.4-rc.0] - 2025-07-21
+
+## Important Updates
+
+This release contains an update to [StarlingMonkey][sm], the engine that powers `componentize-js`.
+Important new features and bugfixes from StarlingMonkey relevant to `componentize-js` that are
+pulled in by this update are listed below:
+
+- Implement `EventTarget` and `Event` builtin ([#220](https://github.com/bytecodealliance/StarlingMonkey/pull/220))
+- Add support for two-argument `has` and `delete` in `URLSearchParams` ([#236](https://github.com/bytecodealliance/StarlingMonkey/pull/236)) 
+
+[sm]: https://github.com/bytecodealliance/StarlingMonkey
+
+### 🐛 Bug Fixes
+
+* *(ci)* release changelog generation (#263) by @vados-cosmonic in #263
+
+* *(ci)* create rc releases as prerelease (#264) by @vados-cosmonic in #264
+
+
+### 🚜 Refactor
+
+* *(tests)* refactor expected globals test (#262) by @vados-cosmonic in #262
+
+
+### ⚙️ Miscellaneous Tasks
+
+* update StarlingMonkey to commit 1f6f81f (#260) by @vados-cosmonic in #260
+
+* *(docs)* add comments to API type in README (#261) by @vados-cosmonic in #261
+
+
+
+
 ## [0.18.3] - 2025-07-16
 
 ### 🚀 Features
diff --git a/package-lock.json b/package-lock.json
index 335077b3..9f996931 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@bytecodealliance/componentize-js",
-  "version": "0.18.3-rc.6",
+  "version": "0.18.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@bytecodealliance/componentize-js",
-      "version": "0.18.3-rc.6",
+      "version": "0.18.3",
       "workspaces": [
         "."
       ],
diff --git a/package.json b/package.json
index 655e74b6..951ff3d1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bytecodealliance/componentize-js",
-  "version": "0.18.3",
+  "version": "0.18.4-rc.0",
   "homepage": "https://github.com/bytecodealliance/componentize-js#readme",
   "description": "ESM -> WebAssembly Component creator, via a SpiderMonkey JS engine embedding",
   "type": "module",
diff --git a/src/cli.js b/src/cli.js
index ee10ec70..67244fdd 100755
--- a/src/cli.js
+++ b/src/cli.js
@@ -22,7 +22,7 @@ export async function componentizeCmd (jsSource, opts) {
 }
 
 program
-  .version('0.18.3')
+  .version('0.18.4-rc.0')
   .description('Create a component from a JavaScript module')
   .usage('<js-source> --wit wit-world.wit -o <component-path>')
   .argument('<js-source>', 'JS source file to build')