diff --git a/src/frontend/package.json b/src/frontend/package.json
index a52260199c..985b6ed805 100644
--- a/src/frontend/package.json
+++ b/src/frontend/package.json
@@ -113,7 +113,7 @@
       "last 1 safari version"
     ]
   },
-  "proxy": "http://127.0.0.1:7860",
+  "proxy": "http://localhost:7860",
   "devDependencies": {
     "@biomejs/biome": "2.1.1",
     "@jest/types": "^30.0.1",
diff --git a/src/frontend/playwright.config.ts b/src/frontend/playwright.config.ts
index 3d8058a9b4..0ffd8d7774 100644
--- a/src/frontend/playwright.config.ts
+++ b/src/frontend/playwright.config.ts
@@ -104,7 +104,7 @@ export default defineConfig({
   webServer: [
     {
       command:
-        "uv run uvicorn --factory langflow.main:create_app --host 127.0.0.1 --port 7860 --loop asyncio",
+        "uv run uvicorn --factory langflow.main:create_app --host localhost --port 7860 --loop asyncio",
       port: 7860,
       env: {
         LANGFLOW_DATABASE_URL: "sqlite:///./temp",
@@ -119,7 +119,7 @@ export default defineConfig({
       command: "npm start",
       port: PORT || 3000,
       env: {
-        VITE_PROXY_TARGET: "http://127.0.0.1:7860",
+        VITE_PROXY_TARGET: "http://localhost:7860",
       },
     },
   ],
diff --git a/src/frontend/src/customization/config-constants.ts b/src/frontend/src/customization/config-constants.ts
index 4096f3779c..3159164486 100644
--- a/src/frontend/src/customization/config-constants.ts
+++ b/src/frontend/src/customization/config-constants.ts
@@ -1,6 +1,6 @@
 export const BASENAME = "";
 export const PORT = 3000;
-export const PROXY_TARGET = "http://127.0.0.1:7860";
+export const PROXY_TARGET = "http://localhost:7860";
 export const API_ROUTES = ["^/api/v1/", "^/api/v2/", "/health"];
 export const BASE_URL_API = "/api/v1/";
 export const BASE_URL_API_V2 = "/api/v2/";
diff --git a/src/frontend/vite.config.mts b/src/frontend/vite.config.mts
index 498ccfb8e5..662a3270be 100644
--- a/src/frontend/vite.config.mts
+++ b/src/frontend/vite.config.mts
@@ -23,7 +23,7 @@ export default defineConfig(({ mode }) => {
   const apiRoutes = API_ROUTES || ["^/api/v1/", "^/api/v2/", "/health"];
 
   const target =
-    env.VITE_PROXY_TARGET || PROXY_TARGET || "http://127.0.0.1:7860";
+    env.VITE_PROXY_TARGET || PROXY_TARGET || "http://localhost:7860";
 
   const port = Number(env.VITE_PORT) || PORT || 3000;
 
@@ -44,7 +44,7 @@ export default defineConfig(({ mode }) => {
     },
     define: {
       "process.env.BACKEND_URL": JSON.stringify(
-        envLangflow.BACKEND_URL ?? "http://127.0.0.1:7860",
+        envLangflow.BACKEND_URL ?? "http://localhost:7860",
       ),
       "process.env.ACCESS_TOKEN_EXPIRE_SECONDS": JSON.stringify(
         envLangflow.ACCESS_TOKEN_EXPIRE_SECONDS ?? 60,