diff --git a/pyproject.toml b/pyproject.toml
index c9b93cc..239ff5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ dependencies = [
     "anyio>=4.4.0",
     "fastapi>=0.111.0",
     "uvicorn[standard]>=0.30.0",
-    "passlib[bcrypt]>=1.7.4",
+    "bcrypt>=4.0.0",
     "email-validator>=2.0.0",
     "cryptography>=42.0.0",
 ]
diff --git a/src/mt_odoo_mcp/auth/crypto.py b/src/mt_odoo_mcp/auth/crypto.py
index d2bbce0..5a70350 100644
--- a/src/mt_odoo_mcp/auth/crypto.py
+++ b/src/mt_odoo_mcp/auth/crypto.py
@@ -1,19 +1,17 @@
 """Password hashing, API key generation, and Fernet encryption for credentials."""
 from __future__ import annotations
 import secrets
-from passlib.context import CryptContext
+import bcrypt
 from cryptography.fernet import Fernet
 from ..config import settings
 
-_pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
-
 
 def hash_password(plain: str) -> str:
-    return _pwd_context.hash(plain)
+    return bcrypt.hashpw(plain.encode(), bcrypt.gensalt()).decode()
 
 
 def verify_password(plain: str, hashed: str) -> bool:
-    return _pwd_context.verify(plain, hashed)
+    return bcrypt.checkpw(plain.encode(), hashed.encode())
 
 
 def generate_api_key() -> tuple[str, str, str]:
@@ -21,17 +19,17 @@ def generate_api_key() -> tuple[str, str, str]:
 
     full_key is shown to the user exactly once.
     key_hash is stored in the DB.
-    key_prefix (first 8 chars) is stored for display.
+    key_prefix (first 12 chars) is stored for display/lookup.
     """
     raw = secrets.token_hex(32)
     full_key = f"mtom_{raw}"
-    key_hash = _pwd_context.hash(full_key)
+    key_hash = bcrypt.hashpw(full_key.encode(), bcrypt.gensalt()).decode()
     key_prefix = full_key[:12]
     return full_key, key_hash, key_prefix
 
 
 def verify_api_key(plain: str, hashed: str) -> bool:
-    return _pwd_context.verify(plain, hashed)
+    return bcrypt.checkpw(plain.encode(), hashed.encode())
 
 
 def _fernet() -> Fernet: