diff --git a/titles/pokken/base.py b/titles/pokken/base.py
index e22ad74..5830f43 100644
--- a/titles/pokken/base.py
+++ b/titles/pokken/base.py
@@ -81,7 +81,7 @@ class PokkenBase:
             "logfilename": "J:\\JackalMatchingLibrary.log",
             "biwalogfilename": "J:\\biwa_log.log",
         }
-        regist_pcb.bnp_baseuri = f"{self.core_cfg.mucha.hostname}/bna"
+        regist_pcb.bnp_baseuri = f"{self.core_cfg.server.hostname}/bna"
         regist_pcb.biwa_setting = json.dumps(biwa_setting)
 
         res.register_pcb.CopyFrom(regist_pcb)