diff --git a/prj.conf b/prj.conf
index 3f1277c..1e1c4c8 100644
--- a/prj.conf
+++ b/prj.conf
@@ -10,13 +10,6 @@ CONFIG_BT=y
 CONFIG_BT_CENTRAL=y
 CONFIG_BT_GATT_CLIENT=y
 
-CONFIG_BT_BUF_ACL_RX_SIZE=255
-CONFIG_BT_BUF_ACL_TX_SIZE=251
-CONFIG_BT_BUF_CMD_TX_SIZE=255
-CONFIG_BT_BUF_EVT_DISCARDABLE_SIZE=255
-
-CONFIG_BT_L2CAP_TX_MTU=247
-
 CONFIG_MODBUS=y
 CONFIG_MODBUS_ROLE_CLIENT=y