diff --git a/.gitignore b/.gitignore
index 0b63ba5..77aca6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,10 +20,6 @@ logs/
 # Environment variables
 .env
 
-# Test files
-tests/
-*.test.py
-
 # System files
 .DS_Store
 Thumbs.db
diff --git a/app/core/constants.py b/app/core/constants.py
index 700116f..14154a6 100644
--- a/app/core/constants.py
+++ b/app/core/constants.py
@@ -22,7 +22,6 @@ DEVICE: str = json.dumps({
 # Each method merges these with its own "referer" and "x-aj-referer".
 BASE_HEADERS: dict[str, str] = {
     "accept":           "application/json, text/javascript, */*; q=0.01",
-    "accept-encoding":  "gzip, deflate, br, zstd",
     "accept-language":  "en-US,en;q=0.9,uk;q=0.8,ru;q=0.7",
     "content-type":     "application/x-www-form-urlencoded; charset=UTF-8",
     "origin":           "https://fragment.com",
diff --git a/app/utils/hash.py b/app/utils/hash.py
index 8b5113c..2acd768 100644
--- a/app/utils/hash.py
+++ b/app/utils/hash.py
@@ -14,11 +14,19 @@ async def get_fragment_hash(
         headers: dict[str, str],
         page_url: str,
 ) -> str:
+    # Must look like a real browser navigation — not an XHR — otherwise Fragment
+    # returns JSON (no hash in it) instead of full HTML.
     page_headers = {
-        **headers,
+        k: v for k, v in headers.items()
+        if k not in ("accept", "accept-encoding", "content-type", "x-requested-with", "x-aj-referer")
+    }
+    page_headers.update({
         "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
         "referer": "https://fragment.com/",
-    }
+        "sec-fetch-dest": "document",
+        "sec-fetch-mode": "navigate",
+        "upgrade-insecure-requests": "1",
+    })
 
     async with httpx.AsyncClient(cookies=cookies) as client:
         response = await client.get(page_url, headers=page_headers)
diff --git a/app/utils/transaction.py b/app/utils/transaction.py
index ffa255f..3cf4ae3 100644
--- a/app/utils/transaction.py
+++ b/app/utils/transaction.py
@@ -1,7 +1,7 @@
 import logging
 
-from tonutils.client import ToncenterV3Client
-from tonutils.wallet import WalletV5R1
+from tonutils.clients import ToncenterClient
+from tonutils.contracts.wallet import WalletV5R1
 
 from app.core import config
 from app.core.exceptions import TransactionError, WalletError
@@ -19,15 +19,16 @@ async def process_transaction(transaction_data: dict) -> str:
             "The API response is missing expected 'transaction.messages' data."
         )
 
-    client = ToncenterV3Client(api_key=config.API_KEY, is_testnet=False)
+    client = ToncenterClient(api_key=config.API_KEY)
     wallet, _, _, _ = WalletV5R1.from_mnemonic(client=client, mnemonic=config.SEED)
 
     # Check balance before broadcasting
     try:
-        balance = await wallet.balance()
-        if float(balance) < 0.056:
+        await wallet.refresh()
+        balance_ton = wallet.balance / 1_000_000_000
+        if balance_ton < 0.056:
             raise WalletError(
-                f"TON wallet balance is too low: {balance} TON. "
+                f"TON wallet balance is too low: {balance_ton:.2f} TON. "
                 "Minimum required is 0.056 TON."
             )
     except WalletError:
diff --git a/app/utils/wallet.py b/app/utils/wallet.py
index 6b8dbc9..83be11f 100644
--- a/app/utils/wallet.py
+++ b/app/utils/wallet.py
@@ -4,8 +4,8 @@ import logging
 from typing import Any
 
 import httpx
-from tonutils.client import ToncenterV3Client
-from tonutils.wallet import WalletV5R1
+from tonutils.clients import ToncenterClient
+from tonutils.contracts.wallet import WalletV5R1
 
 from app.core import config
 from app.core.constants import DEVICE
@@ -17,12 +17,12 @@ logger = logging.getLogger(__name__)
 
 async def get_account_info() -> dict[str, Any]:
     try:
-        client = ToncenterV3Client(api_key=config.API_KEY, is_testnet=False)
+        client = ToncenterClient(api_key=config.API_KEY)
         wallet, pub_key, _, _ = WalletV5R1.from_mnemonic(client=client, mnemonic=config.SEED)
         boc = wallet.state_init.serialize().to_boc()
         return {
             "address":         wallet.address.to_str(False, False),
-            "publicKey":       pub_key.hex(),
+            "publicKey":       pub_key.as_hex,
             "chain":           "-239",
             "walletStateInit": base64.b64encode(boc).decode(),
         }
diff --git a/requirements.txt b/requirements.txt
index 089c06d..ab531a7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 python-dotenv==1.2.2
 asyncio==4.0.0
 httpx==0.28.1
-tonutils==2.0.0
+tonutils[pytoniq]==2.0.0