diff --git a/integrations/express/middleware.ts b/integrations/express/middleware.ts
index 55cf762..7f7cdbc 100644
--- a/integrations/express/middleware.ts
+++ b/integrations/express/middleware.ts
@@ -4,6 +4,7 @@ import Keploy, { HTTP } from "../../src/keploy";
 import { Request, Response, NextFunction } from "express";
 import { createExecutionContext, getExecutionContext } from "../../src/context";
 import { StrArr } from "../../proto/services/StrArr";
+import { MODE_TEST, MODE_RECORD, MODE_OFF } from "../../src/mode";
 
 class ResponseBody {
   static responseMap = new WeakMap<Request, ResponseBody>();
@@ -72,10 +73,10 @@ export default function middleware(
     });
     if (
       (process.env.KEPLOY_MODE != undefined &&
-        process.env.KEPLOY_MODE == "off") ||
+        process.env.KEPLOY_MODE == MODE_OFF) ||
       keploy == undefined
     ) {
-      createExecutionContext({ mode: "off" });
+      createExecutionContext({ mode: MODE_OFF });
       next();
       return;
     }
@@ -84,7 +85,7 @@ export default function middleware(
     // test mode
     if (id != undefined && id != "") {
       createExecutionContext({
-        mode: "test",
+        mode: MODE_TEST,
         testId: id,
         deps: keploy.getDependencies(id),
         mocks: keploy.getMocks(id),
@@ -94,7 +95,7 @@ export default function middleware(
     }
 
     // record mode
-    createExecutionContext({ mode: "record", deps: [], mocks: [] });
+    createExecutionContext({ mode: MODE_RECORD, deps: [], mocks: [] });
     captureResp(req, res, next);
   };
 }
@@ -118,7 +119,7 @@ function captureResp(
 export function afterMiddleware(keploy: Keploy, req: Request, res: Response) {
   if (
     (process.env.KEPLOY_MODE != undefined &&
-      process.env.KEPLOY_MODE == "off") ||
+      process.env.KEPLOY_MODE == MODE_OFF) ||
     keploy == undefined
   ) {
     return;
@@ -140,7 +141,7 @@ export function afterMiddleware(keploy: Keploy, req: Request, res: Response) {
   }
 
   //to avoid recording tests in the test mode and only recording in the record mode
-  if (process.env.KEPLOY_MODE == "test" && id === undefined) {
+  if (process.env.KEPLOY_MODE == MODE_TEST && id === undefined) {
     return;
   }