diff --git a/requirements.txt b/requirements.txt
index c8fb835..768459d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ pydantic==1.*
 fastapi
 uvicorn
 peewee
+psycopg2-binary  # PostgreSQL adapter for Python
 python-multipart
 pandas
 pygsheets