diff --git a/.changeset/wet-falcons-hang.md b/.changeset/wet-falcons-hang.md
deleted file mode 100644
index 2c520a50..00000000
--- a/.changeset/wet-falcons-hang.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"@cloudflare/sandbox": patch
----
-
-add keepAlive flag to prevent containers from shutting down
diff --git a/CLAUDE.md b/CLAUDE.md
index aecfcd35..4344aa10 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -96,7 +96,7 @@ npm run docker:rebuild     # Rebuild container image locally (includes clean bui
 - Stable images when "Version Packages" PR is merged
 - Multi-arch builds (amd64, arm64) handled by CI
 
-**Critical:** Docker image version MUST match npm package version (`@cloudflare/sandbox@0.4.7` → `cloudflare/sandbox:0.4.11`). This is enforced via `ARG SANDBOX_VERSION` in Dockerfile.
+**Critical:** Docker image version MUST match npm package version (`@cloudflare/sandbox@0.4.7` → `cloudflare/sandbox:0.4.12`). This is enforced via `ARG SANDBOX_VERSION` in Dockerfile.
 
 ### Development Server
 
diff --git a/examples/basic/Dockerfile b/examples/basic/Dockerfile
index 1ee52dbb..24d05826 100644
--- a/examples/basic/Dockerfile
+++ b/examples/basic/Dockerfile
@@ -1,12 +1,12 @@
 # This image is unique to this repo, and you'll never need it.
 # Whenever you're integrating with sandbox SDK in your own project,
 # you should use the official image instead:
-# FROM docker.io/cloudflare/sandbox:0.4.11
-FROM cloudflare/sandbox-test:0.4.11
+# FROM docker.io/cloudflare/sandbox:0.4.12
+FROM cloudflare/sandbox-test:0.4.12
 
 # On a mac, you might need to actively pick up the
 # arm64 build of the image.
-# FROM --platform=linux/arm64 cloudflare/sandbox-test:0.4.11
+# FROM --platform=linux/arm64 cloudflare/sandbox-test:0.4.12
 
 # Expose the ports you want to expose
 EXPOSE 8080
diff --git a/examples/claude-code/Dockerfile b/examples/claude-code/Dockerfile
index 6455bf0a..155268a6 100644
--- a/examples/claude-code/Dockerfile
+++ b/examples/claude-code/Dockerfile
@@ -1,7 +1,7 @@
-FROM docker.io/cloudflare/sandbox:0.4.11
+FROM docker.io/cloudflare/sandbox:0.4.12
 RUN npm install -g @anthropic-ai/claude-code
 ENV COMMAND_TIMEOUT_MS=300000
 EXPOSE 3000
 
 # On a Mac with Apple Silicon, you might need to specify the platform:
-# FROM --platform=linux/arm64 docker.io/cloudflare/sandbox:0.4.11
+# FROM --platform=linux/arm64 docker.io/cloudflare/sandbox:0.4.12
diff --git a/examples/code-interpreter/Dockerfile b/examples/code-interpreter/Dockerfile
index d4a03db4..79c9e02f 100644
--- a/examples/code-interpreter/Dockerfile
+++ b/examples/code-interpreter/Dockerfile
@@ -1,9 +1,9 @@
 # This image is unique to this repo, and you'll never need it.
 # Whenever you're integrating with sandbox SDK in your own project,
 # you should use the official image instead:
-# FROM docker.io/cloudflare/sandbox:0.4.11
-FROM cloudflare/sandbox-test:0.4.11
+# FROM docker.io/cloudflare/sandbox:0.4.12
+FROM cloudflare/sandbox-test:0.4.12
 
 # On a mac, you might need to actively pick up the
 # arm64 build of the image.
-# FROM --platform=linux/arm64 cloudflare/sandbox-test:0.4.11
+# FROM --platform=linux/arm64 cloudflare/sandbox-test:0.4.12
diff --git a/examples/code-interpreter/package.json b/examples/code-interpreter/package.json
index 6ddf80d6..67aa0400 100644
--- a/examples/code-interpreter/package.json
+++ b/examples/code-interpreter/package.json
@@ -13,7 +13,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
-    "@cloudflare/sandbox": "^0.4.11",
+    "@cloudflare/sandbox": "^0.4.12",
     "openai": "^5.12.0"
   },
   "devDependencies": {
diff --git a/examples/minimal/Dockerfile b/examples/minimal/Dockerfile
index 0b030af5..a80d12c4 100644
--- a/examples/minimal/Dockerfile
+++ b/examples/minimal/Dockerfile
@@ -1,7 +1,7 @@
-FROM docker.io/cloudflare/sandbox:0.4.11
+FROM docker.io/cloudflare/sandbox:0.4.12
 
 # On a Mac with Apple Silicon, you might need to specify the platform:
-# FROM --platform=linux/arm64 docker.io/cloudflare/sandbox:0.4.11
+# FROM --platform=linux/arm64 docker.io/cloudflare/sandbox:0.4.12
 
 # Required during local development to access exposed ports
 EXPOSE 8080
diff --git a/package-lock.json b/package-lock.json
index 24a77af7..597cb49e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -577,7 +577,7 @@
       "version": "1.0.0",
       "license": "MIT",
       "dependencies": {
-        "@cloudflare/sandbox": "^0.4.11",
+        "@cloudflare/sandbox": "^0.4.12",
         "openai": "^5.12.0"
       },
       "devDependencies": {
@@ -10000,7 +10000,7 @@
     },
     "packages/sandbox": {
       "name": "@cloudflare/sandbox",
-      "version": "0.4.11",
+      "version": "0.4.12",
       "license": "ISC",
       "dependencies": {
         "@cloudflare/containers": "^0.0.29"
diff --git a/packages/sandbox/CHANGELOG.md b/packages/sandbox/CHANGELOG.md
index bccee7b1..66ffaac9 100644
--- a/packages/sandbox/CHANGELOG.md
+++ b/packages/sandbox/CHANGELOG.md
@@ -1,5 +1,11 @@
 # @cloudflare/sandbox
 
+## 0.4.12
+
+### Patch Changes
+
+- [#137](https://github.com/cloudflare/sandbox-sdk/pull/137) [`7f4442b`](https://github.com/cloudflare/sandbox-sdk/commit/7f4442b7a097587d8f8e8f9ff2f887df6943a3db) Thanks [@whoiskatrin](https://github.com/whoiskatrin)! - add keepAlive flag to prevent containers from shutting down
+
 ## 0.4.11
 
 ### Patch Changes
diff --git a/packages/sandbox/package.json b/packages/sandbox/package.json
index d4cb55f8..a7c5dcbd 100644
--- a/packages/sandbox/package.json
+++ b/packages/sandbox/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cloudflare/sandbox",
-  "version": "0.4.11",
+  "version": "0.4.12",
   "repository": {
     "type": "git",
     "url": "https://github.com/cloudflare/sandbox-sdk"
diff --git a/packages/sandbox/src/version.ts b/packages/sandbox/src/version.ts
index 236378b6..f4f3570d 100644
--- a/packages/sandbox/src/version.ts
+++ b/packages/sandbox/src/version.ts
@@ -3,4 +3,4 @@
  * This file is auto-updated by .github/changeset-version.ts during releases
  * DO NOT EDIT MANUALLY - Changes will be overwritten on the next version bump
  */
-export const SDK_VERSION = '0.4.11';
+export const SDK_VERSION = '0.4.12';
diff --git a/tests/e2e/test-worker/Dockerfile b/tests/e2e/test-worker/Dockerfile
index 2203e0d4..0f00c095 100644
--- a/tests/e2e/test-worker/Dockerfile
+++ b/tests/e2e/test-worker/Dockerfile
@@ -1,5 +1,5 @@
 # Integration test Dockerfile
-FROM docker.io/cloudflare/sandbox-test:0.4.11
+FROM docker.io/cloudflare/sandbox-test:0.4.12
 
 # Expose ports used for testing
 EXPOSE 8080