diff --git a/src/lib/lockup.ts b/src/lib/lockup.ts
index e3867ca..bc4f5b2 100644
--- a/src/lib/lockup.ts
+++ b/src/lib/lockup.ts
@@ -1,11 +1,11 @@
 import BN from "bn.js";
-import { ConnectConfig } from "near-api-js/lib/connect";
 import { CodeResult } from "near-api-js/lib/providers/provider";
 import { BinaryReader } from "near-api-js/lib/utils/serialize";
 
 import {
   AccountLockup,
   BlockReference,
+  ConnectOptions,
   LockupState,
   ViewAccount,
   ViewAccountQuery,
@@ -32,7 +32,7 @@ import {
  */
 export const viewLockupState = async (
   contractId: string,
-  nearConfig?: ConnectConfig,
+  nearConfig?: ConnectOptions,
   blockReference: BlockReference = { finality: "final" }
 ): Promise<LockupState> => {
   const near = await nearApi(nearConfig);
@@ -95,7 +95,7 @@ export const viewLockupState = async (
  */
 export const getAccountBalance = async (
   contractId: string,
-  nearConfig?: ConnectConfig,
+  nearConfig?: ConnectOptions,
   blockReference: BlockReference = { finality: "final" }
 ): Promise<string | null> => {
   const near = await nearApi(nearConfig);
@@ -127,7 +127,7 @@ export const getAccountBalance = async (
  */
 export const viewAccountBalance = async (
   accountId: string,
-  nearConfig?: ConnectConfig,
+  nearConfig?: ConnectOptions,
   blockReference: BlockReference = { finality: "final" }
   ): Promise<ViewAccount | null> => {
   const near = await nearApi(nearConfig);
@@ -159,7 +159,7 @@ export const viewAccountBalance = async (
  */
 export const viewLockupAccount = async (
   lockupAccountId: string,
-  nearConfig?: ConnectConfig,
+  nearConfig?: ConnectOptions,
   blockReference?: BlockReference
 ): Promise<AccountLockup | null> => {
   try {
diff --git a/src/lib/near.ts b/src/lib/near.ts
index cdf93df..5df607d 100644
--- a/src/lib/near.ts
+++ b/src/lib/near.ts
@@ -2,7 +2,9 @@ import * as near from "near-api-js";
 import { ConnectConfig } from "near-api-js/lib/connect";
 import { InMemoryKeyStore } from "near-api-js/lib/key_stores";
 
-export const connectOptions: ConnectConfig = {
+import { ConnectOptions } from "../types/types";
+
+const connectOptions: ConnectConfig = {
   nodeUrl: "https://rpc.mainnet.near.org",
   networkId: "mainnet",
   keyStore: new InMemoryKeyStore(),
@@ -11,10 +13,14 @@ export const connectOptions: ConnectConfig = {
 
 /**
  * Connect to NEAR rpc.
- * @param connectOptions connection options {@link ConnectConfig}.
+ * @param config connection options {@link ConnectConfig}.
  * @returns connection to Near network.
  */
-export const nearApi = async (config: ConnectConfig = connectOptions) => {
-  const options = config ?? connectOptions;
+export const nearApi = async (config?: ConnectOptions) => {
+  const options = {
+    ...connectOptions,
+    ...config
+  };
+
   return await near.connect(options)
 };
diff --git a/src/tests/lockup.spec.ts b/src/tests/lockup.spec.ts
index 2262b05..1b00ba9 100644
--- a/src/tests/lockup.spec.ts
+++ b/src/tests/lockup.spec.ts
@@ -2,7 +2,6 @@
 import test from "ava";
 
 import { getAccountBalance, viewLockupAccount, viewLockupState } from "../lib/lockup";
-import { connectOptions } from "../lib/near";
 
 import { lockupAccountSnapshots } from "./snapshots";
 
@@ -24,19 +23,11 @@ test("view all info about lockup account on 'finality' block", async (t) => {
 test("view all info about account on particular block using arhival credencials", async (t) => {
   const items = lockupAccountSnapshots.length;
   t.plan(items);
-
-  const arhivalConfig = {
-    nodeUrl: "https://archival-rpc.mainnet.near.org",
-    networkId: "mainnet",
-    keyStore: connectOptions.keyStore,
-    headers: connectOptions.headers
-  };
-
   // eslint-disable-next-line functional/no-let
   for (let i = 0; i < items; i++) {
     const res = await viewLockupAccount(
       lockupAccountSnapshots[i].lockupAccountId,
-      arhivalConfig,
+      { nodeUrl: "https://archival-rpc.mainnet.near.org" },
       { block_id: lockupAccountSnapshots[i].calculatedAtBlockHeight }
     );
     t.deepEqual(res, lockupAccountSnapshots[i]);
diff --git a/src/types/types.ts b/src/types/types.ts
index 6785744..344d6f7 100644
--- a/src/types/types.ts
+++ b/src/types/types.ts
@@ -1,4 +1,6 @@
 import BN from "bn.js";
+import { ConnectConfig } from "near-api-js/lib/connect";
+import { KeyStore } from "near-api-js/lib/key_stores/keystore";
 import { QueryResponseKind } from "near-api-js/lib/providers/provider";
 
 export type LockupState = {
@@ -73,3 +75,11 @@ export type ViewAccount = {
   readonly codeHash: string;
   readonly blockHeight: number;
 };
+
+export type ConnectOptions = Omit<ConnectConfig, "networkId" | "keyStore" | "headers"> & {
+  readonly networkId?: string;
+  readonly keyStore?: KeyStore;
+  readonly headers?: {
+    readonly [key: string]: string | number;
+  }
+};