diff --git a/src/sphinx_data_viewer/sphinx_data_viewer.py b/src/sphinx_data_viewer/sphinx_data_viewer.py
index fe97bf3..40664f2 100644
--- a/src/sphinx_data_viewer/sphinx_data_viewer.py
+++ b/src/sphinx_data_viewer/sphinx_data_viewer.py
@@ -50,7 +50,10 @@ def install_lib_static_files(app: Sphinx, env) -> None:
     statics_dir = Path(app.builder.outdir) / "_static"
     source_dir = Path(__file__).parent / "assets"
     destination_dir = statics_dir / "sphinx-data-viewer"
-    copy_asset(str(source_dir), str(destination_dir))
+    if sphinx_version >= (8, 0):
+        copy_asset(str(source_dir), str(destination_dir), force=True)
+    else:
+        copy_asset(str(source_dir), str(destination_dir))
 
     lib_path = Path("sphinx-data-viewer")
     _add_js_file(app, lib_path.joinpath("jsonview.bundle.js"))
diff --git a/tests/test_basic.py b/tests/test_basic.py
index 896d3c3..cb6e782 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -17,14 +17,17 @@ def test_build(builder: str, tmp_path: Path, make_app: type[SphinxTestApp]):
     It looks like that there are scenarios where this specific build makes trouble but no others.
     """
     tmp_path.joinpath("conf.py").write_text(
-        dedent("""\
+        dedent(
+            """\
         extensions = ["sphinx_data_viewer"]
-        """),
+        """
+        ),
         encoding="utf-8",
     )
     tmp_path.joinpath("test.json").write_text('{"a": [1, 2, 3]}', encoding="utf-8")
     tmp_path.joinpath("index.rst").write_text(
-        dedent("""\
+        dedent(
+            """\
         Title
         =====
                
@@ -35,7 +38,8 @@ def test_build(builder: str, tmp_path: Path, make_app: type[SphinxTestApp]):
                
         .. data-viewer::
             :file: test.json
-        """),
+        """
+        ),
         encoding="utf-8",
     )