diff --git a/pyproject.toml b/pyproject.toml
index c74d20c..9541b21 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,12 @@ ruff = "^0.4.9"
 # Set the maximum line length to 79.
 line-length = 79
 
+[tool.ruff.lint]
+select = [
+    # flake8
+    "W",
+]
+
 [tool.pytest.ini_options]
 addopts = [
     "--import-mode=importlib",
diff --git a/src/npg_notify/porch_wrapper/qc_state.py b/src/npg_notify/porch_wrapper/qc_state.py
index b71f569..f5937c0 100644
--- a/src/npg_notify/porch_wrapper/qc_state.py
+++ b/src/npg_notify/porch_wrapper/qc_state.py
@@ -240,7 +240,7 @@ def process_task(conf_file_path) -> bool:
     product_id = claimed_task["task_input"]["id_product"]
     try:
         url = re.sub(
-            "\[\w+\]",
+            r"\[\w+\]",
             product_id,
             pac_bio_well_libraries_path,
         )