diff --git a/.env.example b/.env.example
index 2da2b00..57c654f 100644
--- a/.env.example
+++ b/.env.example
@@ -30,6 +30,8 @@ UVICORN_PORT = 8000
 # HOME_PAGE_TEMPLATE="home/index.html"
 
 # SQLALCHEMY_DATABASE_URL = "sqlite:///db.sqlite3"
+# SQLALCHEMY_CONNECTION_POOL_SIZE = 10
+# SQLALCHEMY_CONNECTION_MAX_OVERFLOW = -1
 
 ### for developers
 # DOCS=true
diff --git a/app/config/env.py b/app/config/env.py
index a1aa701..cd5b34e 100755
--- a/app/config/env.py
+++ b/app/config/env.py
@@ -9,7 +9,12 @@ DASHBOARD_PATH = config("DASHBOARD_PATH", default="/dashboard/")
 SQLALCHEMY_DATABASE_URL = config(
     "SQLALCHEMY_DATABASE_URL", default="sqlite:///db.sqlite3"
 )
-
+SQLALCHEMY_CONNECTION_POOL_SIZE = config(
+    "SQLALCHEMY_CONNECTION_POOL_SIZE", default=10, cast=int
+)
+SQLALCHEMY_CONNECTION_MAX_OVERFLOW = config(
+    "SQLALCHEMY_CONNECTION_MAX_OVERFLOW", default=-1, cast=int
+)
 
 UVICORN_HOST = config("UVICORN_HOST", default="0.0.0.0")
 UVICORN_PORT = config("UVICORN_PORT", cast=int, default=8000)
diff --git a/app/db/base.py b/app/db/base.py
index ca9c952..77f8842 100644
--- a/app/db/base.py
+++ b/app/db/base.py
@@ -2,7 +2,11 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import declarative_base
 from sqlalchemy.orm import sessionmaker
 
-from app.config.env import SQLALCHEMY_DATABASE_URL
+from app.config.env import (
+    SQLALCHEMY_DATABASE_URL,
+    SQLALCHEMY_CONNECTION_POOL_SIZE,
+    SQLALCHEMY_CONNECTION_MAX_OVERFLOW,
+)
 
 IS_SQLITE = SQLALCHEMY_DATABASE_URL.startswith("sqlite")
 
@@ -15,8 +19,8 @@ if IS_SQLITE:
 else:
     engine = create_engine(
         SQLALCHEMY_DATABASE_URL,
-        pool_size=10,
-        max_overflow=30,
+        pool_size=SQLALCHEMY_CONNECTION_POOL_SIZE,
+        max_overflow=SQLALCHEMY_CONNECTION_MAX_OVERFLOW,
         pool_recycle=3600,
         pool_timeout=10,
     )