diff --git a/services/api-server/src/api_server/main.py b/services/api-server/src/api_server/main.py
index 81f1234..140f141 100644
--- a/services/api-server/src/api_server/main.py
+++ b/services/api-server/src/api_server/main.py
@@ -135,7 +135,16 @@ from ui_semantics import form_semantics
 
 app = FastAPI(title="SFERA API", version="0.1.0")
 _HTML5_ASSETS_DIR = Path(__file__).resolve().parent / "static" / "html5"
-app.mount("/html5/assets", StaticFiles(directory=_HTML5_ASSETS_DIR), name="html5-assets")
+
+
+class Html5StaticFiles(StaticFiles):
+    def file_response(self, *args, **kwargs):
+        response = super().file_response(*args, **kwargs)
+        response.headers.setdefault("Cache-Control", "public, max-age=3600")
+        return response
+
+
+app.mount("/html5/assets", Html5StaticFiles(directory=_HTML5_ASSETS_DIR), name="html5-assets")
 app.add_middleware(
     CORSMiddleware,
     allow_origin_regex=os.environ.get(
diff --git a/services/api-server/tests/test_api.py b/services/api-server/tests/test_api.py
index 2bd4467..74936af 100644
--- a/services/api-server/tests/test_api.py
+++ b/services/api-server/tests/test_api.py
@@ -257,14 +257,17 @@ def test_html5_server_rendered_project_editor(tmp_path: Path):
     htmx_asset = client.get("/html5/assets/htmx.min.js")
     assert htmx_asset.status_code == 200
     assert "javascript" in htmx_asset.headers["content-type"]
+    assert htmx_asset.headers["cache-control"] == "public, max-age=3600"
     assert "htmx" in htmx_asset.text
     sse_asset = client.get("/html5/assets/htmx-ext-sse.js")
     assert sse_asset.status_code == 200
     assert "javascript" in sse_asset.headers["content-type"]
+    assert sse_asset.headers["cache-control"] == "public, max-age=3600"
     assert "sse" in sse_asset.text
     css_asset = client.get("/html5/assets/html5.css")
     assert css_asset.status_code == 200
     assert "text/css" in css_asset.headers["content-type"]
+    assert css_asset.headers["cache-control"] == "public, max-age=3600"
     assert ".workspace" in css_asset.text