diff --git a/scripts/sync-plugin-versions.ts b/scripts/sync-plugin-versions.ts
index 5dfac2ee1bb..3e12b8a23d6 100644
--- a/scripts/sync-plugin-versions.ts
+++ b/scripts/sync-plugin-versions.ts
@@ -4,7 +4,6 @@ import { join, resolve } from "node:path";
 type PackageJson = {
   name?: string;
   version?: string;
-  devDependencies?: Record<string, string>;
 };
 
 function ensureChangelogEntry(changelogPath: string, version: string): boolean {
diff --git a/src/scripts/sync-plugin-versions.test.ts b/src/scripts/sync-plugin-versions.test.ts
new file mode 100644
index 00000000000..24fc0922ca6
--- /dev/null
+++ b/src/scripts/sync-plugin-versions.test.ts
@@ -0,0 +1,52 @@
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { syncPluginVersions } from "../../scripts/sync-plugin-versions.js";
+
+const tempDirs: string[] = [];
+
+function writeJson(filePath: string, value: unknown) {
+  fs.mkdirSync(path.dirname(filePath), { recursive: true });
+  fs.writeFileSync(filePath, `${JSON.stringify(value, null, 2)}\n`, "utf8");
+}
+
+describe("syncPluginVersions", () => {
+  afterEach(() => {
+    for (const dir of tempDirs.splice(0)) {
+      fs.rmSync(dir, { recursive: true, force: true });
+    }
+  });
+
+  it("preserves workspace openclaw devDependencies while bumping versions", () => {
+    const rootDir = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-sync-plugin-versions-"));
+    tempDirs.push(rootDir);
+
+    writeJson(path.join(rootDir, "package.json"), {
+      name: "openclaw",
+      version: "2026.3.31",
+    });
+    writeJson(path.join(rootDir, "extensions/bluebubbles/package.json"), {
+      name: "@openclaw/bluebubbles",
+      version: "2026.3.30",
+      devDependencies: {
+        openclaw: "workspace:*",
+      },
+      peerDependencies: {
+        openclaw: ">=2026.3.30",
+      },
+    });
+
+    const summary = syncPluginVersions(rootDir);
+    const updatedPackage = JSON.parse(
+      fs.readFileSync(path.join(rootDir, "extensions/bluebubbles/package.json"), "utf8"),
+    ) as {
+      version?: string;
+      devDependencies?: Record<string, string>;
+    };
+
+    expect(summary.updated).toContain("@openclaw/bluebubbles");
+    expect(updatedPackage.version).toBe("2026.3.31");
+    expect(updatedPackage.devDependencies?.openclaw).toBe("workspace:*");
+  });
+});