diff --git a/app/core/config.py b/app/core/config.py
index 3fd3058..6e8151b 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -1,13 +1,12 @@
 import os
 from pathlib import Path
-from pydantic import field_validator
-from pydantic_settings import BaseSettings
+from pydantic import field_validator, BaseModel
 
 # Project directories
 ROOT_DIR = Path(__file__).parent.parent.parent.resolve()
 
 
-class Settings(BaseSettings):
+class Settings(BaseModel):
     # Project info
     PROJECT_NAME: str = "One-Time Secret Sharing Service"
     API_V1_STR: str = "/api/v1"
@@ -28,9 +27,10 @@ class Settings(BaseSettings):
         db_dir.mkdir(parents=True, exist_ok=True)
         return db_dir
 
-    class Config:
-        env_file = ".env"
-        case_sensitive = True
+    model_config = {
+        "env_file": ".env",
+        "case_sensitive": True,
+    }
 
 
 # Create global settings instance
diff --git a/requirements.txt b/requirements.txt
index 5f02353..0264456 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ SQLAlchemy>=2.0.9
 alembic>=1.10.4
 python-dotenv>=1.0.0
 pydantic>=2.0.0
+pydantic-settings>=2.0.0
 ruff>=0.0.262
 cryptography>=40.0.2
 asyncio>=3.4.3