diff --git a/mocha_core/mocha_core/database.py b/mocha_core/mocha_core/database.py
index 2b1d94f..8f70524 100644
--- a/mocha_core/mocha_core/database.py
+++ b/mocha_core/mocha_core/database.py
@@ -3,9 +3,6 @@
 import mocha_core.hash_comm as hash_comm
 import rclpy.time
 import pdb
-import mocha_core.database_utils as du
-import numpy as np
-import copy
 
 
 class DBMessage():