diff --git a/scrapple/hearings.py b/scrapple/hearings.py
index 527aff4..b6dfc5e 100644
--- a/scrapple/hearings.py
+++ b/scrapple/hearings.py
@@ -2,7 +2,7 @@ import httpx
 import json
 import pathlib
 from . import app
-from flask import request
+from flask import request, abort
 
 BASE_API_URL = "https://scrapple.fly.io/hearings/house/118/"
 BASE_DIR = pathlib.Path("data/congress-hearing-118-house")
@@ -34,8 +34,10 @@ def shortened(hearing):
 @app.route("/hearings")
 def hearings_list():
     offset = int(request.args.get("offset", 0))
-    limit = int(request.args.get("limit", 50))
+    limit = min(int(request.args.get("limit", 50)), 200)
     format = request.args.get("format", "json")
+    if offset < 0:
+        abort(404)
     if offset + limit > len(ALL_HEARINGS):
         next_url = None
     else:
@@ -60,4 +62,6 @@ def hearings_list():
 
 @app.route("/hearings/<jacket_id>")
 def hearings_detail(jacket_id):
+    if jacket_id not in ALL_HEARINGS:
+        abort(404)
     return ALL_HEARINGS[jacket_id]