diff --git a/Dockerfile b/Dockerfile
index 3fb55a3..d7fd5d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,8 +4,14 @@ FROM docker.io/cloudflare/sandbox:0.7.0
 # The base image has Node 20, we need to replace it with Node 22
 # Using direct binary download for reliability
 ENV NODE_VERSION=22.13.1
-RUN apt-get update && apt-get install -y xz-utils ca-certificates rsync \
-    && curl -fsSLk https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.xz -o /tmp/node.tar.xz \
+RUN ARCH="$(dpkg --print-architecture)" \
+    && case "${ARCH}" in \
+         amd64) NODE_ARCH="x64" ;; \
+         arm64) NODE_ARCH="arm64" ;; \
+         *) echo "Unsupported architecture: ${ARCH}" >&2; exit 1 ;; \
+       esac \
+    && apt-get update && apt-get install -y xz-utils ca-certificates rsync \
+    && curl -fsSLk https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-${NODE_ARCH}.tar.xz -o /tmp/node.tar.xz \
     && tar -xJf /tmp/node.tar.xz -C /usr/local --strip-components=1 \
     && rm /tmp/node.tar.xz \
     && node --version \