diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index d34e87f46..04004d7d1 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.55.3"
+  ".": "4.55.4"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fefb710b2..d43fd4772 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## 4.55.4 (2024-08-09)
+
+Full Changelog: [v4.55.3...v4.55.4](https://github.com/openai/openai-node/compare/v4.55.3...v4.55.4)
+
+### Bug Fixes
+
+* **helpers/zod:** nested union schema extraction ([#979](https://github.com/openai/openai-node/issues/979)) ([31b05aa](https://github.com/openai/openai-node/commit/31b05aa6fa0445141ae17a1b1eff533b83735f3a))
+
+
+### Chores
+
+* **ci:** bump prism mock server version ([#982](https://github.com/openai/openai-node/issues/982)) ([7442643](https://github.com/openai/openai-node/commit/7442643e8445eea15da54843a7c9d7580a402979))
+* **ci:** codeowners file ([#980](https://github.com/openai/openai-node/issues/980)) ([17a42b2](https://github.com/openai/openai-node/commit/17a42b2f6e2de2dce338358a48f6d7d4ed723f6f))
+
 ## 4.55.3 (2024-08-08)
 
 Full Changelog: [v4.55.2...v4.55.3](https://github.com/openai/openai-node/compare/v4.55.2...v4.55.3)
diff --git a/README.md b/README.md
index 13f449a29..50f7f09e2 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ You can import in Deno via:
 <!-- x-release-please-start-version -->
 
 ```ts
-import OpenAI from 'https://deno.land/x/openai@v4.55.3/mod.ts';
+import OpenAI from 'https://deno.land/x/openai@v4.55.4/mod.ts';
 ```
 
 <!-- x-release-please-end -->
diff --git a/package.json b/package.json
index 31f5bc16a..9110c179b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openai",
-  "version": "4.55.3",
+  "version": "4.55.4",
   "description": "The official TypeScript library for the OpenAI API",
   "author": "OpenAI <support@openai.com>",
   "types": "dist/index.d.ts",
diff --git a/scripts/build-deno b/scripts/build-deno
index cd4cbd4f5..79fd58ea4 100755
--- a/scripts/build-deno
+++ b/scripts/build-deno
@@ -16,7 +16,7 @@ This is a build produced from https://github.com/openai/openai-node – please g
 Usage:
 
 \`\`\`ts
-import OpenAI from "https://deno.land/x/openai@v4.55.3/mod.ts";
+import OpenAI from "https://deno.land/x/openai@v4.55.4/mod.ts";
 
 const client = new OpenAI();
 \`\`\`
diff --git a/src/version.ts b/src/version.ts
index ec9119c18..f4a031b0b 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '4.55.3'; // x-release-please-version
+export const VERSION = '4.55.4'; // x-release-please-version