diff --git a/app.py b/app.py
index 45e86c9..c0ce2ce 100644
--- a/app.py
+++ b/app.py
@@ -9,7 +9,7 @@ from play import build_non_letter_hint, build_letter_hint
 
 app = Flask(__name__)
 app.config['SECRET_KEY'] = sensitive.SECRET_KEY
-NUM_GAMES = 4593
+NUM_GAMES = len(list(cat_words())) - 1
 GUESS_SPLITTER = '|'
 STATE_PLAYING = 'PLAYING'
 STATE_WIN = 'WIN'
@@ -39,7 +39,7 @@ def init_random_game():
 @app.route('/init/deterministic', methods=['post'])
 def init_deterministic_game():
     game_id = request.form.get('game_id')
-    if not game_id.isdigit() or not 0 <= int(game_id) < NUM_GAMES:
+    if not game_id.isdigit() or not 0 <= int(game_id) <= NUM_GAMES:
         flash("game_id must be between 0 and {}".format(NUM_GAMES))
         return redirect(url_for('home'))
     return redirect(url_for('init_deterministic_game_id', game_id=game_id))
diff --git a/templates/home.html b/templates/home.html
index 34dc500..8c725a4 100644
--- a/templates/home.html
+++ b/templates/home.html
@@ -2,7 +2,7 @@
 {% block body %}
 <a href="{{url_for('init_random_game')}}">Random game</a>
 <form method="post" action="{{url_for('init_deterministic_game')}}">
-    <label>Predefined (0 to {{ num_games }})</label>
+    <label>Deterministic (0 to {{ num_games }})</label>
     <input type="number" min="0" max="{{ num_games }}" name="game_id" autofocus/>
     <input type="submit">
 </form>