diff --git a/src/lib/actions/update.test.ts b/src/lib/actions/update.test.ts
index eba856d098c..689020387d2 100644
--- a/src/lib/actions/update.test.ts
+++ b/src/lib/actions/update.test.ts
@@ -47,6 +47,7 @@ describe("runUpdateAction", () => {
     expect(spawnSyncImpl).not.toHaveBeenCalled();
     expect(log).toHaveBeenCalledWith(expect.stringContaining("Current NemoClaw version: 0.1.0"));
     expect(log).toHaveBeenCalledWith(expect.stringContaining("Latest maintained version: 0.2.0"));
+    expect(log).toHaveBeenCalledWith(expect.stringContaining(NEMOCLAW_UPDATE_COMMAND));
   });
 
   it("renders NemoHermes branding and installer guidance for --check when the Hermes alias is active", async () => {
@@ -68,7 +69,7 @@ describe("runUpdateAction", () => {
     expect(log).toHaveBeenCalledWith(expect.stringContaining("Current NemoHermes version: 0.1.0"));
     expect(log).toHaveBeenCalledWith(
       expect.stringContaining(
-        "curl -fsSL https://www.nvidia.com/nemoclaw.sh | NEMOCLAW_AGENT=hermes bash",
+        "curl -fsSL --proto '=https' --proto-redir '=https' https://www.nvidia.com/nemoclaw.sh | NEMOCLAW_AGENT=hermes bash",
       ),
     );
   });
@@ -94,7 +95,7 @@ describe("runUpdateAction", () => {
     );
     expect(log).toHaveBeenCalledWith(
       expect.stringContaining(
-        "curl -fsSL https://www.nvidia.com/nemoclaw.sh | NEMOCLAW_AGENT=langchain-deepagents-code bash",
+        "curl -fsSL --proto '=https' --proto-redir '=https' https://www.nvidia.com/nemoclaw.sh | NEMOCLAW_AGENT=langchain-deepagents-code bash",
       ),
     );
   });
@@ -201,6 +202,29 @@ describe("runUpdateAction", () => {
     expect(log).toHaveBeenCalledWith(expect.stringContaining("reinstalling anyway (--fresh)"));
   });
 
+  it("restricts the maintained installer fetch and redirects to HTTPS", async () => {
+    const spawnSyncImpl = vi.fn(
+      () => ({ status: 0, stdout: "", stderr: "", signal: null }) as never,
+    );
+
+    const result = await runUpdateAction(
+      { yes: true },
+      {
+        currentVersion: () => "0.1.0",
+        getMaintainedTarget: () => maintainedTarget("0.2.0"),
+        isSourceCheckout: () => false,
+        log: vi.fn(),
+        spawnSyncImpl,
+      },
+    );
+
+    expect(result.ranInstaller).toBe(true);
+    const [command, args] = spawnSyncImpl.mock.calls[0] as unknown as [string, readonly string[]];
+    expect(command).toBe("bash");
+    expect(args.at(-1)).toContain("--proto '=https'");
+    expect(args.at(-1)).toContain("--proto-redir '=https'");
+  });
+
   it("refuses --fresh when the maintained tag is older than the install, even with --yes (#8306)", async () => {
     const spawnSyncImpl = vi.fn();
     const error = vi.fn();
@@ -351,29 +375,32 @@ describe("runUpdateAction", () => {
     ["1.0.0", "01.0.0", "maintained release component"],
     ["1.0.0-01", "1.0.0-1", "installed prerelease identifier"],
     ["1.0.0-1", "1.0.0-01", "maintained prerelease identifier"],
-  ])("fails closed on --fresh for a leading zero in the %s (%s; %s) (#8306)", async (currentVersion, latestVersion) => {
-    const spawnSyncImpl = vi.fn();
-    const error = vi.fn();
+  ])(
+    "fails closed on --fresh for a leading zero in the %s (%s; %s) (#8306)",
+    async (currentVersion, latestVersion) => {
+      const spawnSyncImpl = vi.fn();
+      const error = vi.fn();
 
-    const result = await runUpdateAction(
-      { fresh: true, yes: true },
-      {
-        currentVersion: () => currentVersion,
-        error,
-        getMaintainedTarget: () => maintainedTarget(latestVersion),
-        isSourceCheckout: () => false,
-        log: vi.fn(),
-        spawnSyncImpl,
-      },
-    );
+      const result = await runUpdateAction(
+        { fresh: true, yes: true },
+        {
+          currentVersion: () => currentVersion,
+          error,
+          getMaintainedTarget: () => maintainedTarget(latestVersion),
+          isSourceCheckout: () => false,
+          log: vi.fn(),
+          spawnSyncImpl,
+        },
+      );
 
-    expect(result.ranInstaller).toBe(false);
-    expect(result.status).toBe(1);
-    expect(result.updateAvailable).toBeNull();
-    expect(spawnSyncImpl).not.toHaveBeenCalled();
-    expect(error).toHaveBeenCalledWith(expect.stringContaining("Cannot order"));
-    expect(error).toHaveBeenCalledWith(expect.stringContaining("--allow-downgrade"));
-  });
+      expect(result.ranInstaller).toBe(false);
+      expect(result.status).toBe(1);
+      expect(result.updateAvailable).toBeNull();
+      expect(spawnSyncImpl).not.toHaveBeenCalled();
+      expect(error).toHaveBeenCalledWith(expect.stringContaining("Cannot order"));
+      expect(error).toHaveBeenCalledWith(expect.stringContaining("--allow-downgrade"));
+    },
+  );
 
   it("fails closed on --fresh when the maintained tag cannot be resolved (#8306)", async () => {
     const spawnSyncImpl = vi.fn();
diff --git a/src/lib/actions/update.ts b/src/lib/actions/update.ts
index 167f1bbc15b..c7eef1918d8 100644
--- a/src/lib/actions/update.ts
+++ b/src/lib/actions/update.ts
@@ -11,7 +11,15 @@ import { normalizeVersion } from "../domain/installer/version";
 
 export const NEMOCLAW_INSTALLER_URL = "https://www.nvidia.com/nemoclaw.sh";
 export const NEMOCLAW_REPO_URL = "https://github.com/NVIDIA/NemoClaw.git";
-export const NEMOCLAW_UPDATE_COMMAND = `curl -fsSL ${NEMOCLAW_INSTALLER_URL} | bash`;
+/**
+ * Pipeline `nemoclaw update` runs to install the maintained build.
+ * `--proto '=https'` and `--proto-redir '=https'` hold the transfer on HTTPS for
+ * the initial request and for every redirect, so a downgrade redirect fails
+ * closed instead of piping plaintext-fetched bytes into `bash`. Same fetch
+ * hardening as `src/lib/onboard/install-ollama-linux.ts`.
+ */
+const NEMOCLAW_UPDATE_FETCH_COMMAND = `curl -fsSL --proto '=https' --proto-redir '=https' ${NEMOCLAW_INSTALLER_URL}`;
+export const NEMOCLAW_UPDATE_COMMAND = `${NEMOCLAW_UPDATE_FETCH_COMMAND} | bash`;
 export const NEMOCLAW_MAINTAINED_INSTALL_TAG = "lkg";
 
 type LogFn = (message?: string) => void;
@@ -80,6 +88,11 @@ function trimOutput(value: string | Buffer | null | undefined): string {
 
 const UPDATE_BRANDING_AGENTS = ["openclaw", "hermes", "langchain-deepagents-code"] as const;
 
+function maintainedUpdateCommand(agent?: (typeof UPDATE_BRANDING_AGENTS)[number]): string {
+  const agentAssignment = agent ? `NEMOCLAW_AGENT=${agent} ` : "";
+  return `${NEMOCLAW_UPDATE_FETCH_COMMAND} | ${agentAssignment}bash`;
+}
+
 function updateBranding(env: NodeJS.ProcessEnv): UpdateBranding {
   const agent =
     resolveAgentNameAlias(env.NEMOCLAW_AGENT, UPDATE_BRANDING_AGENTS) ?? env.NEMOCLAW_AGENT;
@@ -87,20 +100,20 @@ function updateBranding(env: NodeJS.ProcessEnv): UpdateBranding {
     return {
       cliName: "nemohermes",
       displayName: "NemoHermes",
-      maintainedUpdateCommand: `curl -fsSL ${NEMOCLAW_INSTALLER_URL} | NEMOCLAW_AGENT=hermes bash`,
+      maintainedUpdateCommand: maintainedUpdateCommand("hermes"),
     };
   }
   if (agent === "langchain-deepagents-code") {
     return {
       cliName: "nemo-deepagents",
       displayName: "NemoDeepAgents",
-      maintainedUpdateCommand: `curl -fsSL ${NEMOCLAW_INSTALLER_URL} | NEMOCLAW_AGENT=langchain-deepagents-code bash`,
+      maintainedUpdateCommand: maintainedUpdateCommand("langchain-deepagents-code"),
     };
   }
   return {
     cliName: "nemoclaw",
     displayName: "NemoClaw",
-    maintainedUpdateCommand: NEMOCLAW_UPDATE_COMMAND,
+    maintainedUpdateCommand: maintainedUpdateCommand(),
   };
 }