diff --git a/packages/core/__tests__/db.test.js b/packages/core/__tests__/db.test.js
new file mode 100644
index 000000000..44de8f638
--- /dev/null
+++ b/packages/core/__tests__/db.test.js
@@ -0,0 +1,9 @@
+import DB from "../api";
+import Constants from "../utils/constants";
+import StorageInterface from "../__mocks__/storage.mock";
+
+test("db.host should change HOST", () => {
+  const db = new DB(StorageInterface);
+  db.host("hello world");
+  expect(Constants.HOST).toBe("hello world");
+});
diff --git a/packages/core/api/index.js b/packages/core/api/index.js
index 53f7c2ccc..33909e377 100644
--- a/packages/core/api/index.js
+++ b/packages/core/api/index.js
@@ -12,7 +12,7 @@ import Backup from "../database/backup";
 import Conflicts from "./sync/conflicts";
 import EventManager from "../utils/event-manager";
 import Session from "./session";
-import { HOST } from "../utils/constants";
+import Constants from "../utils/constants";
 
 /**
  * @type {EventSource}
@@ -117,7 +117,7 @@ class Database {
 
   host(host) {
     if (process.env.NODE_ENV !== "production") {
-      HOST = host || HOST;
+      Constants.HOST = host || HOST;
     }
   }
 }
diff --git a/packages/core/api/sync/index.js b/packages/core/api/sync/index.js
index 44ef5871c..317758844 100644
--- a/packages/core/api/sync/index.js
+++ b/packages/core/api/sync/index.js
@@ -25,7 +25,7 @@
  * Syncing should pause until all the conflicts have been resolved
  * And then it should continue.
  */
-import { HOST, HEADERS } from "../../utils/constants";
+import Constants from "../../utils/constants";
 import Collector from "./collector";
 import Merger from "./merger";
 import { areAllEmpty } from "./utils";
@@ -46,8 +46,8 @@ export default class Sync {
   }
 
   async _fetch(lastSynced, token) {
-    let response = await fetch(`${HOST}/sync?lst=${lastSynced}`, {
-      headers: { ...HEADERS, Authorization: `Bearer ${token}` },
+    let response = await fetch(`${Constants.HOST}/sync?lst=${lastSynced}`, {
+      headers: { ...Constants.HEADERS, Authorization: `Bearer ${token}` },
     });
     return await response.json();
   }
@@ -108,9 +108,9 @@ export default class Sync {
   }
 
   async _send(data, token) {
-    let response = await fetch(`${HOST}/sync`, {
+    let response = await fetch(`${Constants.HOST}/sync`, {
       method: "POST",
-      headers: { ...HEADERS, Authorization: `Bearer ${token}` },
+      headers: { ...Constants.HEADERS, Authorization: `Bearer ${token}` },
       body: JSON.stringify(data),
     });
     if (response.ok) {
diff --git a/packages/core/models/user.js b/packages/core/models/user.js
index cdc220a55..5679d1e99 100644
--- a/packages/core/models/user.js
+++ b/packages/core/models/user.js
@@ -1,4 +1,4 @@
-import { HOST, HEADERS } from "../utils/constants";
+import Constants from "../utils/constants";
 
 export default class User {
   /**
@@ -138,9 +138,9 @@ async function authRequest(endpoint, data, auth = false, get = false) {
     };
   }
 
-  let response = await fetch(`${HOST}/${endpoint}`, {
+  let response = await fetch(`${Constants.HOST}/${endpoint}`, {
     method: get ? "GET" : "POST",
-    headers: { ...HEADERS, ...headers },
+    headers: { ...Constants.HEADERS, ...headers },
     body: get ? undefined : JSON.stringify(data),
   });
 
diff --git a/packages/core/utils/constants.js b/packages/core/utils/constants.js
index 21b916ce4..997dcc080 100644
--- a/packages/core/utils/constants.js
+++ b/packages/core/utils/constants.js
@@ -1,10 +1,14 @@
-export var HOST =
-  process.env.NODE_ENV === "production"
-    ? "https://api.notesnook.com"
-    : "http://0.0.0.0:8000";
-export const HEADERS = {
-  agent: "nn/1.0.0",
-  origin: "notesnook.com",
-  "Content-Type": "application/json",
-  Accept: "application/json",
+const module = {
+  HOST:
+    process.env.NODE_ENV === "production"
+      ? "https://api.notesnook.com"
+      : "http://0.0.0.0:8000",
+  HEADERS: {
+    agent: "nn/1.0.0",
+    origin: "notesnook.com",
+    "Content-Type": "application/json",
+    Accept: "application/json",
+  },
 };
+
+export default module;