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index 75a03d1ee7..6526129e1c 100644
--- a/package-lock.json
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+      "license": "MIT",
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@@ -17681,7 +17671,7 @@
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-      "version": "0.21.0-nightly.20251212.54de67536",
+      "version": "0.21.0-nightly.20251213.977248e09",
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@@ -17991,7 +17981,8 @@
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-      "version": "0.21.0-nightly.20251212.54de67536",
+      "version": "0.21.0-nightly.20251213.977248e09",
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@@ -18092,7 +18083,8 @@
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-      "version": "0.21.0-nightly.20251212.54de67536",
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@@ -18237,7 +18228,7 @@
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-      "version": "0.21.0-nightly.20251212.54de67536",
+      "version": "0.21.0-nightly.20251213.977248e09",
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@@ -18248,7 +18239,7 @@
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-      "version": "0.21.0-nightly.20251212.54de67536",
+      "version": "0.21.0-nightly.20251213.977248e09",
       "license": "LICENSE",
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diff --git a/package.json b/package.json
index a9fdc7a7ea..e7274fe934 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
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-  "version": "0.21.0-nightly.20251212.54de67536",
+  "version": "0.21.0-nightly.20251213.977248e09",
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@@ -14,7 +14,7 @@
     "url": "git+https://github.com/google-gemini/gemini-cli.git"
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   "config": {
-    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.21.0-nightly.20251212.54de67536"
+    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.21.0-nightly.20251213.977248e09"
   },
   "scripts": {
     "start": "cross-env NODE_ENV=development node scripts/start.js",
diff --git a/packages/a2a-server/package.json b/packages/a2a-server/package.json
index 57c88657c2..11439b90ea 100644
--- a/packages/a2a-server/package.json
+++ b/packages/a2a-server/package.json
@@ -1,6 +1,6 @@
 {
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-  "version": "0.21.0-nightly.20251212.54de67536",
+  "version": "0.21.0-nightly.20251213.977248e09",
   "description": "Gemini CLI A2A Server",
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diff --git a/packages/cli/package.json b/packages/cli/package.json
index b1d3812c55..d16b4117f8 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
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-  "version": "0.21.0-nightly.20251212.54de67536",
+  "version": "0.21.0-nightly.20251213.977248e09",
   "description": "Gemini CLI",
   "license": "Apache-2.0",
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@@ -26,7 +26,7 @@
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+    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.21.0-nightly.20251213.977248e09"
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diff --git a/packages/core/package.json b/packages/core/package.json
index e2d88d9f4a..263b9f7f03 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
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-  "version": "0.21.0-nightly.20251212.54de67536",
+  "version": "0.21.0-nightly.20251213.977248e09",
   "description": "Gemini CLI Core",
   "license": "Apache-2.0",
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diff --git a/packages/test-utils/package.json b/packages/test-utils/package.json
index 7c3b650d67..f7608ed76f 100644
--- a/packages/test-utils/package.json
+++ b/packages/test-utils/package.json
@@ -1,6 +1,6 @@
 {
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-  "version": "0.21.0-nightly.20251212.54de67536",
+  "version": "0.21.0-nightly.20251213.977248e09",
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diff --git a/packages/vscode-ide-companion/package.json b/packages/vscode-ide-companion/package.json
index 6e6e6c018e..594a7ddea5 100644
--- a/packages/vscode-ide-companion/package.json
+++ b/packages/vscode-ide-companion/package.json
@@ -2,7 +2,7 @@
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   "displayName": "Gemini CLI Companion",
   "description": "Enable Gemini CLI with direct access to your IDE workspace.",
-  "version": "0.21.0-nightly.20251212.54de67536",
+  "version": "0.21.0-nightly.20251213.977248e09",
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