diff --git a/apps/smartdoc/conf.py b/apps/smartdoc/conf.py
index 8d2248bca..c303c1923 100644
--- a/apps/smartdoc/conf.py
+++ b/apps/smartdoc/conf.py
@@ -111,7 +111,7 @@ class Config(dict):
             "ENGINE": self.get('DB_ENGINE'),
             "POOL_OPTIONS": {
                 "POOL_SIZE": 20,
-                "MAX_OVERFLOW": self.get('DB_MAX_OVERFLOW')
+                "MAX_OVERFLOW": int(self.get('DB_MAX_OVERFLOW'))
             }
         }