diff --git a/matcher/api.py b/matcher/api.py
index 7be38c3..9c1d431 100644
--- a/matcher/api.py
+++ b/matcher/api.py
@@ -1020,7 +1020,7 @@ def item_detail(item: model.Item) -> ItemDetailType:
         )
 
     isa_items = [get_item(isa["numeric-id"]) for isa in item.get_isa()]
-    isa_lookup = {isa.qid: isa for isa in isa_items}
+    isa_lookup = {isa.qid: isa for isa in isa_items if isa}
 
     wikipedia_links = [
         {"lang": site[:-4], "title": link["title"]}
diff --git a/matcher/database.py b/matcher/database.py
index ccd022b..78162cf 100644
--- a/matcher/database.py
+++ b/matcher/database.py
@@ -10,7 +10,7 @@ from sqlalchemy.orm import scoped_session, sessionmaker
 
 session: sqlalchemy.orm.scoping.scoped_session = scoped_session(sessionmaker())
 
-timeout = 2_000  # 20 seconds
+timeout = 20_000  # 20 seconds
 
 
 def init_db(db_url: str, echo: bool = False) -> None:
diff --git a/matcher/nominatim.py b/matcher/nominatim.py
index 279b669..c15b8fc 100644
--- a/matcher/nominatim.py
+++ b/matcher/nominatim.py
@@ -118,7 +118,7 @@ def get_hit_name(hit: Hit) -> str:
 
 def get_hit_label(hit: Hit) -> str:
     """Parse hit and generate label."""
-    tags = hit["extratags"]
+    tags = hit["extratags"] or {}
     designation = tags.get("designation")
     category = hit["category"]
     hit_type = hit["type"]
diff --git a/package.json b/package.json
index 4cd71ad..29251d7 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,8 @@
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^4.4.0",
+    "eslint": "^9.2.0",
+    "eslint-plugin-vue": "^9.25.0",
     "rollup-plugin-esm-import-to-url": "^2.1.0",
     "vite": "^4.5.0"
   }