diff --git a/ts/elasticlog.classes.elasticlog.ts b/ts/elasticlog.classes.elasticlog.ts
index ee04dd0..68a615c 100644
--- a/ts/elasticlog.classes.elasticlog.ts
+++ b/ts/elasticlog.classes.elasticlog.ts
@@ -1,19 +1,9 @@
-export type Environment = "local" | "test" | "staging" | "production";
-
 // interfaces
 import { Client as ElasticClient } from "elasticsearch";
 
 // other classes
 import { LogScheduler } from "./elasticlog.classes.logscheduler";
 
-export interface LogContext {
-  zone?: string;
-  containerName?: string;
-  environment: Environment;
-}
-
-export type TLogSeverity = "log" | "info" | "warn" | "error" | "fatal";
-
 export interface IStandardLogParams {
   message: string;
   severity: string;
@@ -76,6 +66,7 @@ export class ElasticLog<T> {
         type: "log",
         body: {
           "@timestamp": now.toISOString(),
+          zone: this.logContext.zone,
           container: this.logContext.containerName,
           environment: this.logContext.environment,
           severity: logObject.severity,
diff --git a/yarn.lock b/yarn.lock
index 44779b8..a01bbab 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -590,10 +590,6 @@ vinyl@^2.0.1:
     remove-trailing-separator "^1.0.1"
     replace-ext "^1.0.0"
 
-winston-transport@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/winston-transport/-/winston-transport-3.0.1.tgz#8008b15eef5660c4fb3fa094d58ccbd08528c58d"
-
 word-wrap@^1.0.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/word-wrap/-/word-wrap-1.2.3.tgz#610636f6b1f703891bd34771ccb17fb93b47079c"