diff --git a/app/pyproject.toml b/app/pyproject.toml
index 79770e20..2783e096 100644
--- a/app/pyproject.toml
+++ b/app/pyproject.toml
@@ -52,7 +52,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest>=8.0",
-    "ruff>=0.16,<0.17",
+    "ruff>=0.16,<0.18",
 ]
 
 [tool.setuptools.packages.find]
@@ -86,6 +86,9 @@ markers = [
 # deliberately deviates from; correctness rules with real findings were fixed
 # rather than added here.
 [tool.ruff.lint]
+# Ruff 0.17 dropped these from its defaults; keep them on so the rule set is the
+# same on 0.16 and 0.17 (the codebase's DTZ noqa comments stay meaningful).
+extend-select = ["DTZ001", "DTZ006", "DTZ012", "DTZ901"]
 ignore = [
     # The app catches Exception at edges (best-effort operations, request
     # handlers, background sync/scheduler ticks) so one bad row/URL never takes