diff --git a/dj_db_conn_pool/backends/postgis/base.py b/dj_db_conn_pool/backends/postgis/base.py
index e6a96c9..85c7762 100644
--- a/dj_db_conn_pool/backends/postgis/base.py
+++ b/dj_db_conn_pool/backends/postgis/base.py
@@ -3,9 +3,9 @@
 from django.contrib.gis.db.backends.postgis import base
 from sqlalchemy.dialects.postgresql.base import PGDialect
 
-from dj_db_conn_pool.core.mixins import PersistentDatabaseWrapperMixin
+from dj_db_conn_pool.backends.postgresql.mixins import PGDatabaseWrapperMixin
 
 
-class DatabaseWrapper(PersistentDatabaseWrapperMixin, base.DatabaseWrapper):
+class DatabaseWrapper(PGDatabaseWrapperMixin, base.DatabaseWrapper):
     class SQLAlchemyDialect(PGDialect):
         pass