diff --git a/openclaw_assistant/CHANGELOG.md b/openclaw_assistant/CHANGELOG.md
index 5c6e88a..b7c0717 100644
--- a/openclaw_assistant/CHANGELOG.md
+++ b/openclaw_assistant/CHANGELOG.md
@@ -15,6 +15,9 @@ All notable changes to the OpenClaw Assistant Home Assistant Add-on will be docu
 ### Translations
 - Added `controlui_disable_device_auth` labels/descriptions to: `en`, `bg`, `de`, `es`, `pl`, `pt-BR`.
 
+### Fixed
+- Docker build stability: replaced NodeSource `setup_22.x | bash` installer with explicit keyring + apt source configuration for Node.js 22, avoiding intermittent `apt-get install nodejs` exit code 100 failures.
+
 ## [0.5.54] - 2026-02-25
 
 ### Changed
diff --git a/openclaw_assistant/Dockerfile b/openclaw_assistant/Dockerfile
index 5d491fe..e2e2a1f 100644
--- a/openclaw_assistant/Dockerfile
+++ b/openclaw_assistant/Dockerfile
@@ -34,8 +34,14 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
  && rm -rf /var/lib/apt/lists/*
 
 # Install Node.js 22 LTS from NodeSource (Debian Bookworm ships Node 18, but OpenClaw requires 20+)
-RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
- && apt-get install -y nodejs \
+# Use explicit keyring + apt source instead of setup_22.x pipe script for deterministic builds.
+RUN mkdir -p /etc/apt/keyrings \
+ && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key \
+    | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
+ && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_22.x nodistro main" \
+    > /etc/apt/sources.list.d/nodesource.list \
+ && apt-get update \
+ && apt-get install -y --no-install-recommends nodejs \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*
 
diff --git a/openclaw_assistant/config.yaml b/openclaw_assistant/config.yaml
index dbde2ac..ee839e3 100644
--- a/openclaw_assistant/config.yaml
+++ b/openclaw_assistant/config.yaml
@@ -1,5 +1,5 @@
 name: OpenClaw Assistant
-version: "0.5.56"
+version: "0.5.57"
 slug: openclaw_assistant
 description: Run OpenClaw Assistant (OpenClaw-compatible) as a Home Assistant add-on.
 url: https://github.com/techartdev/OpenClawHomeAssistant