diff --git a/piker/brokers/deribit/api.py b/piker/brokers/deribit/api.py
index e05f86a5..82cb8d8f 100644
--- a/piker/brokers/deribit/api.py
+++ b/piker/brokers/deribit/api.py
@@ -234,17 +234,18 @@ def get_config() -> dict[str, Any]:
         )
 
     conf_option = section.get('option', {})
-    section = {} # clear the dict to reuse it
-    section['deribit'] = {}
-    section['deribit']['key_id'] = conf_option.get('api_key')
-    section['deribit']['key_secret'] = conf_option.get('api_secret')
 
-    section['log'] = {}
-    section['log']['filename'] = 'feedhandler.log'
-    section['log']['level'] = 'DEBUG'
-    section['log']['disabled'] = True
-
-    return section
+    return {
+        'deribit': {
+            'key_id': conf_option.get('api_key'),
+            'key_secret': conf_option.get('api_secret'),
+        },
+        'log': {
+            'filename': 'feedhandler.log',
+            'level': 'DEBUG',
+            'disabled': True,
+        }
+    }
 
 
 class Client:
@@ -912,7 +913,7 @@ async def maybe_open_oi_feed(
         kwargs={
             'instruments': instruments
         },
-        key=f'{instruments[0]}',
+        key=f'{instruments[0].base}',
 
     ) as (cache_hit, feed):
         if cache_hit: