diff --git a/.changeset/decode-mounted-r2-object-keys.md b/.changeset/decode-mounted-r2-object-keys.md
deleted file mode 100644
index a3f074d8b..000000000
--- a/.changeset/decode-mounted-r2-object-keys.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'@cloudflare/sandbox': patch
----
-
-Allow mounted R2 buckets to open object keys containing spaces, symbols, percent signs, and non-ASCII characters.
diff --git a/package-lock.json b/package-lock.json
index 227d3a2a8..82c258c25 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13012,7 +13012,7 @@
     },
     "packages/sandbox": {
       "name": "@cloudflare/sandbox",
-      "version": "0.12.8",
+      "version": "0.12.9",
       "license": "Apache-2.0",
       "dependencies": {
         "@cloudflare/containers": "^0.3.5",
diff --git a/packages/sandbox/CHANGELOG.md b/packages/sandbox/CHANGELOG.md
index 5e0e60248..7c8d9033b 100644
--- a/packages/sandbox/CHANGELOG.md
+++ b/packages/sandbox/CHANGELOG.md
@@ -1,5 +1,11 @@
 # @cloudflare/sandbox
 
+## 0.12.9
+
+### Patch Changes
+
+- [#877](https://github.com/cloudflare/sandbox-sdk/pull/877) [`664d8e3`](https://github.com/cloudflare/sandbox-sdk/commit/664d8e36d22f2b8f286a9cac90551113afdb316c) Thanks [@scuffi](https://github.com/scuffi)! - Allow mounted R2 buckets to open object keys containing spaces, symbols, percent signs, and non-ASCII characters.
+
 ## 0.12.8
 
 ### Patch Changes
diff --git a/packages/sandbox/package.json b/packages/sandbox/package.json
index 69a9179df..19379d81f 100644
--- a/packages/sandbox/package.json
+++ b/packages/sandbox/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cloudflare/sandbox",
-  "version": "0.12.8",
+  "version": "0.12.9",
   "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 0055f1116..9b3d0c917 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 = '0.12.8';
+export const SDK_VERSION = '0.12.9';