diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b257f2fbe8..ff1f1cdcd67 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ Docs: https://docs.openclaw.ai
 
 ### Changes
 
+- Docker: run the runtime image under `tini` so long-lived containers reap orphaned child processes and forward signals correctly. (#77885) Thanks @VintageAyu.
 - Google/Gemini: normalize retired `google/gemini-3-pro-preview` and `google-gemini-cli/gemini-3-pro-preview` selections to `google/gemini-3.1-pro-preview` before they are written to model config.
 - Amazon Bedrock: support `serviceTier` parameter for Bedrock models, configurable via `agents.defaults.params.serviceTier` or per-model in `agents.defaults.models`. Valid values: `default`, `flex`, `priority`, `reserved`. (#64512) Thanks @mobilinkd.
 - Control UI: read the Quick Settings exec policy badge from `tools.exec.security` instead of the non-schema `agents.defaults.exec.security` path, so configured `full`/`deny` values render accurately. Fixes #78311. Thanks @FriedBack.
diff --git a/Dockerfile b/Dockerfile
index 3e9213bb882..cc411a8a2f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -160,7 +160,7 @@ RUN --mount=type=cache,id=openclaw-bookworm-apt-cache,target=/var/cache/apt,shar
     --mount=type=cache,id=openclaw-bookworm-apt-lists,target=/var/lib/apt,sharing=locked \
     apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-      ca-certificates procps hostname curl git lsof openssl python3 && \
+      ca-certificates procps hostname curl git lsof openssl python3 tini && \
     update-ca-certificates
 
 RUN chown node:node /app
@@ -287,4 +287,5 @@ USER node
 # For external access from host/ingress, override bind to "lan" and set auth.
 HEALTHCHECK --interval=3m --timeout=10s --start-period=15s --retries=3 \
   CMD node -e "fetch('http://127.0.0.1:18789/healthz').then((r)=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
+ENTRYPOINT ["tini", "-s", "--"]
 CMD ["node", "openclaw.mjs", "gateway", "--allow-unconfigured"]
diff --git a/docs/install/docker.md b/docs/install/docker.md
index 6862f845565..0bd131ad5d8 100644
--- a/docs/install/docker.md
+++ b/docs/install/docker.md
@@ -427,8 +427,7 @@ See [ClawDock](/install/clawdock) for the full helper guide.
   </Accordion>
 
   <Accordion title="Base image metadata">
-    The main Docker runtime image uses `node:24-bookworm-slim` and publishes OCI
-    base-image annotations including `org.opencontainers.image.base.name`,
+    The main Docker runtime image uses `node:24-bookworm-slim` and includes `tini` as the entrypoint init process (PID 1) to ensure zombie processes are reaped and signals are handled correctly in long-running containers. It publishes OCI base-image annotations including `org.opencontainers.image.base.name`,
     `org.opencontainers.image.source`, and others. The Node base digest is
     refreshed through Dependabot Docker base-image PRs; release builds do not run
     a distro upgrade layer. See
diff --git a/docs/install/fly.md b/docs/install/fly.md
index 4dfa083d74d..b88e810a785 100644
--- a/docs/install/fly.md
+++ b/docs/install/fly.md
@@ -78,6 +78,8 @@ read_when:
       destination = "/data"
     ```
 
+    The OpenClaw Docker image uses `tini` as its entrypoint. Fly process commands replace Docker `CMD` without replacing `ENTRYPOINT`, so the process still runs under `tini`.
+
     **Key settings:**
 
     | Setting                        | Why                                                                         |
diff --git a/src/dockerfile.test.ts b/src/dockerfile.test.ts
index ef7e2d35f88..2ef7dfa5a5a 100644
--- a/src/dockerfile.test.ts
+++ b/src/dockerfile.test.ts
@@ -47,7 +47,7 @@ describe("Dockerfile", () => {
     expect(collapsed).toContain("update-ca-certificates");
   });
 
-  it("installs python3 in the slim runtime stage for workspace scripts", async () => {
+  it("installs python3 and tini in the slim runtime stage", async () => {
     const dockerfile = collapseDockerContinuations(await readFile(dockerfilePath, "utf8"));
     const runtimeIndex = dockerfile.indexOf(
       "FROM ${OPENCLAW_NODE_BOOKWORM_SLIM_IMAGE} AS base-runtime",
@@ -59,7 +59,10 @@ describe("Dockerfile", () => {
     expect(runtimeIndex).toBeGreaterThan(-1);
     expect(pythonInstallIndex).toBeGreaterThan(runtimeIndex);
     expect(pythonInstallIndex).toBeLessThan(dockerfile.indexOf("RUN chown node:node /app"));
-    expect(dockerfile).toContain("ca-certificates procps hostname curl git lsof openssl python3");
+    expect(dockerfile).toContain(
+      "ca-certificates procps hostname curl git lsof openssl python3 tini",
+    );
+    expect(dockerfile).toContain('ENTRYPOINT ["tini", "-s", "--"]');
   });
 
   it("installs optional browser dependencies after pnpm install", async () => {