diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..fd4d749
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,7 @@
+flask
+pandas
+cherrypy
+requests
+werkzeug
+python-dotenv
+requests-oauthlib
\ No newline at end of file
diff --git a/web/finances.py b/web/finances.py
index 37b88c5..611209c 100755
--- a/web/finances.py
+++ b/web/finances.py
@@ -36,17 +36,37 @@ def register(app):
         donations = data['donations']
         expenses = data['expenses']
 
+        try:
+            avg = round(sum([i['amount_usd'] for i in donations]) / len(donations), 2)
+        except ZeroDivisionError:
+            avg = 0
+
+        try:
+            most_donation = max(donations, key=lambda x: x['amount_usd'])['currency']
+        except ValueError:
+            most_donation = '?'
+
+        try:
+            most_expense = max(expenses, key=lambda x: x['amount_usd'])['currency']
+        except ValueError:
+            most_expense = '?'
+
+        try:
+            donations_max = round(max([i['amount_usd'] for i in donations]))
+        except ValueError:
+            donations_max = 0
+
         finances = {
             'last_update': data['timestamp'],
             'donations_total': round(sum([i['amount_usd'] for i in donations])),
             'donations_num': len(donations),
-            'donations_avg': round(sum([i['amount_usd'] for i in donations]) / len(donations), 2),
-            'donations_max': round(max([i['amount_usd'] for i in donations])),
-            'most_used_donation_currency': max(donations, key=lambda x: x['amount_usd'])['currency'],
+            'donations_avg': avg,
+            'donations_max': donations_max,
+            'most_used_donation_currency': most_donation,
 
             'expenses_total': round(sum([i['amount_usd'] for i in expenses])),
             'expenses_wages': round(sum([i['amount_usd'] for i in expenses if i['type'] == 'wage'])),
-            'most_used_expense_currency': max(expenses, key=lambda x: x['amount_usd'])['currency'],
+            'most_used_expense_currency': most_expense,
         }
 
         transaction_table = []
diff --git a/web/tos.py b/web/tos.py
index 00799c8..6dcab3f 100755
--- a/web/tos.py
+++ b/web/tos.py
@@ -19,8 +19,8 @@ def register(app):
         emoji = random.choice(open('config/emojis.txt', encoding='utf8').read())
 
         if not os.path.exists('data/tos.json'):
+            os.makedirs('data', exist_ok=True)
             open('data/tos.json', 'w', encoding='utf8').write('{}')
-
         try:
             data = ujson.load(open('data/tos.json', encoding='utf8'))
         except JSONDecodeError: