diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 846b4c8..8d35a50 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,5 +1,5 @@
 {
-  "packages/sandbox": "0.4.2",
+  "packages/sandbox": "0.4.3",
   "packages/agent": "0.7.2",
   "packages/provider": "0.3.4"
 }
diff --git a/packages/sandbox/CHANGELOG.md b/packages/sandbox/CHANGELOG.md
index 65689e1..0b71b7f 100644
--- a/packages/sandbox/CHANGELOG.md
+++ b/packages/sandbox/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## [0.4.3](https://github.com/coder/ai-sdk/compare/sandbox-v0.4.2...sandbox-v0.4.3) (2026-08-25)
+
+A maintenance release with no user-facing changes.
+
 ## [0.4.2](https://github.com/coder/ai-sdk/compare/sandbox-v0.4.1...sandbox-v0.4.2) (2026-08-24)
 
 Adds a new documentation guide covering how to author zero-install templates.
diff --git a/packages/sandbox/package.json b/packages/sandbox/package.json
index 3266b21..6cd4067 100644
--- a/packages/sandbox/package.json
+++ b/packages/sandbox/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@coder/ai-sdk-sandbox",
-  "version": "0.4.2",
+  "version": "0.4.3",
   "description": "Coder workspace sandbox provider for the Vercel AI SDK v7 HarnessAgent",
   "keywords": [
     "ai-sdk",