diff --git a/stac_fastapi/pgstac/config.py b/stac_fastapi/pgstac/config.py
index c0d04a9..5fe9582 100644
--- a/stac_fastapi/pgstac/config.py
+++ b/stac_fastapi/pgstac/config.py
@@ -3,6 +3,7 @@
 from typing import List, Type
 from urllib.parse import quote
 
+from pydantic import BaseModel, Extra
 from stac_fastapi.types.config import ApiSettings
 
 from stac_fastapi.pgstac.types.base_item_cache import (
@@ -32,6 +33,13 @@
 ]
 
 
+class ServerSettings(BaseModel, extra=Extra.allow):
+    """Server runtime parameters."""
+
+    search_path: str = "pgstac,public"
+    application_name: str = "pgstac"
+
+
 class Settings(ApiSettings):
     """Postgres-specific API settings.
 
@@ -58,6 +66,8 @@ class Settings(ApiSettings):
     db_max_queries: int = 50000
     db_max_inactive_conn_lifetime: float = 300
 
+    server_settings: ServerSettings = ServerSettings()
+
     use_api_hydrate: bool = False
     base_item_cache: Type[BaseItemCache] = DefaultBaseItemCache
     invalid_id_chars: List[str] = DEFAULT_INVALID_ID_CHARS
@@ -78,3 +88,8 @@ def writer_connection_string(self):
     def testing_connection_string(self):
         """Create testing psql connection string."""
         return f"postgresql://{self.postgres_user}:{quote(self.postgres_pass)}@{self.postgres_host_writer}:{self.postgres_port}/pgstactestdb"
+
+    class Config(ApiSettings.Config):
+        """Model config."""
+
+        env_nested_delimiter = "__"
diff --git a/stac_fastapi/pgstac/db.py b/stac_fastapi/pgstac/db.py
index 6d42ea3..c70611b 100644
--- a/stac_fastapi/pgstac/db.py
+++ b/stac_fastapi/pgstac/db.py
@@ -132,9 +132,6 @@ async def create_pool(self, connection_string: str, settings):
             max_queries=settings.db_max_queries,
             max_inactive_connection_lifetime=settings.db_max_inactive_conn_lifetime,
             init=con_init,
-            server_settings={
-                "search_path": "pgstac,public",
-                "application_name": "pgstac",
-            },
+            server_settings=settings.server_settings.dict(),
         )
         return pool