diff --git a/src/main/kotlin/io/emeraldpay/dshackle/Global.kt b/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
index e45f8920..fac11f1e 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
@@ -29,7 +29,8 @@ import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import io.emeraldpay.grpc.Chain
 import java.text.SimpleDateFormat
-import java.util.*
+import java.util.Locale
+import java.util.TimeZone
 import java.util.concurrent.Executors
 import java.util.concurrent.ScheduledExecutorService