diff --git a/apps/explorer/lib/explorer/chain_spec/poa/importer.ex b/apps/explorer/lib/explorer/chain_spec/poa/importer.ex
index d731f08aa6..00d54a3d74 100644
--- a/apps/explorer/lib/explorer/chain_spec/poa/importer.ex
+++ b/apps/explorer/lib/explorer/chain_spec/poa/importer.ex
@@ -3,6 +3,8 @@ defmodule Explorer.ChainSpec.POA.Importer do
   Imports emission reward range for POA chain.
   """
 
+  require Logger
+
   alias Explorer.Chain.Wei
   alias Explorer.Repo
   alias Explorer.SmartContract.Reader