diff --git a/database/database.py b/database/database.py
index a59806f..020ad33 100644
--- a/database/database.py
+++ b/database/database.py
@@ -3,11 +3,14 @@ from sqlalchemy.orm import sessionmaker, declarative_base
 import os
 
 DB_PATH = os.path.join(os.path.dirname(os.path.dirname(__file__)), "regwatch.db")
-DATABASE_URL = f"sqlite:///{DB_PATH}"
+DATABASE_URL = os.getenv("DATABASE_URL", f"sqlite:///{DB_PATH}")
+
+# check_same_thread est propre à SQLite : psycopg2 le rejette.
+CONNECT_ARGS = {"check_same_thread": False} if DATABASE_URL.startswith("sqlite") else {}
 
 engine = create_engine(
     DATABASE_URL,
-    connect_args={"check_same_thread": False}
+    connect_args=CONNECT_ARGS
 )
 
 SessionLocal = sessionmaker(
diff --git a/requirements.txt b/requirements.txt
index b8eb833..34e56e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,5 @@ ollama
 python-jose[cryptography]
 passlib[argon2]
 python-multipart
-pdfplumber
\ No newline at end of file
+pdfplumber
+psycopg2-binary