diff --git a/nvitop/core/host.py b/nvitop/core/host.py
index 8799464..61faeb0 100644
--- a/nvitop/core/host.py
+++ b/nvitop/core/host.py
@@ -74,3 +74,6 @@ else:
     WSL = None
 WINDOWS_SUBSYSTEM_FOR_LINUX = WSL
 """The Linux distribution name of the Windows Subsystem for Linux."""
+
+
+del _os, _defaultdict, _ttl_cache