diff --git a/app/static/index.html b/app/static/index.html
index 1e31e5d..3d6d3d7 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -4,8 +4,8 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>할 일 올리기</title>
-  <link rel="stylesheet" href="/static/style.css">
-  <script src="/static/app.js" defer></script>
+  <link rel="stylesheet" href="/static/style.css?v=cf3fbd25f560">
+  <script src="/static/app.js?v=013873d8e411" defer></script>
 </head>
 <body>
   <main id="login-screen" class="center-card" hidden>
diff --git a/tests/test_ui_contract.py b/tests/test_ui_contract.py
index 77bc768..8aa4aab 100644
--- a/tests/test_ui_contract.py
+++ b/tests/test_ui_contract.py
@@ -1,3 +1,4 @@
+import hashlib
 from pathlib import Path
 
 
@@ -50,3 +51,11 @@ def test_receipts_are_not_persisted_in_browser_storage():
     assert "JSON.stringify(receipts)" not in script
     assert "const receipts = []" in script
     assert "cowork_pending_request" in script
+
+
+def test_static_asset_urls_include_current_content_hash():
+    html = Path("app/static/index.html").read_text(encoding="utf-8")
+    for asset in ("app.js", "style.css"):
+        content = Path(f"app/static/{asset}").read_bytes()
+        version = hashlib.sha256(content).hexdigest()[:12]
+        assert f"/static/{asset}?v={version}" in html