diff --git a/package.json b/package.json
index 55df747..da9a6ba 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
   "engines": {
     "node": ">=14.0.0"
   },
+  "sideEffects": false,
   "keywords": [],
   "author": "",
   "license": "ISC",
diff --git a/src/lib/types/index.ts b/src/lib/types/index.ts
index af1ad32..a7e292c 100644
--- a/src/lib/types/index.ts
+++ b/src/lib/types/index.ts
@@ -1,4 +1,4 @@
-import { BytesLike, ethers } from "ethers";
+import { BytesLike, Signer, BrowserProvider } from "ethers";
 
 export enum RelayCall {
   CallWithSyncFee,
@@ -78,4 +78,4 @@ export type SafeRequestPayload<T> = {
     : T[K];
 };
 
-export type SignerOrProvider = ethers.BrowserProvider | ethers.Signer;
+export type SignerOrProvider = BrowserProvider | Signer;
diff --git a/src/utils/generateSalt.ts b/src/utils/generateSalt.ts
index 01338ef..041060d 100644
--- a/src/utils/generateSalt.ts
+++ b/src/utils/generateSalt.ts
@@ -1,10 +1,10 @@
-import { ethers } from "ethers";
+import { AbiCoder, keccak256 } from "ethers";
 
 export const generateSalt = (): string => {
   const randomSeed = Math.floor(Math.random() * 1000000);
-  const dataEncoded = ethers.AbiCoder.defaultAbiCoder().encode(
+  const dataEncoded = AbiCoder.defaultAbiCoder().encode(
     ["uint256", "uint256"],
     [randomSeed, new Date().getMilliseconds()]
   );
-  return ethers.keccak256(dataEncoded);
+  return keccak256(dataEncoded);
 };
diff --git a/src/utils/getProviderChainId.ts b/src/utils/getProviderChainId.ts
index 5f1607b..105b88f 100644
--- a/src/utils/getProviderChainId.ts
+++ b/src/utils/getProviderChainId.ts
@@ -1,4 +1,4 @@
-import { ethers } from "ethers";
+import { Provider } from "ethers";
 
 import { SignerOrProvider } from "../lib/types";
 
@@ -7,7 +7,7 @@ import { isSigner } from "./isSigner";
 export const getProviderChainId = async (
   signerOrProvider: SignerOrProvider
 ): Promise<bigint> => {
-  let provider: ethers.Provider;
+  let provider: Provider;
   if (isSigner(signerOrProvider)) {
     if (!signerOrProvider.provider) {
       throw new Error(`Missing provider`);
diff --git a/src/utils/getUserNonce.ts b/src/utils/getUserNonce.ts
index 0551678..a2c90a6 100644
--- a/src/utils/getUserNonce.ts
+++ b/src/utils/getUserNonce.ts
@@ -1,4 +1,4 @@
-import { ethers } from "ethers";
+import { Contract } from "ethers";
 
 import { USER_NONCE_ABI } from "../constants";
 import { Config, SignerOrProvider } from "../lib/types";
@@ -22,7 +22,7 @@ export const getUserNonce = async (
 
   const chainId = await getProviderChainId(signerOrProvider);
 
-  const contract = new ethers.Contract(
+  const contract = new Contract(
     getGelatoRelayERC2771Address({ chainId, type }, config),
     USER_NONCE_ABI,
     signerOrProvider
diff --git a/src/utils/isSigner.ts b/src/utils/isSigner.ts
index 29cfaa8..8a62595 100644
--- a/src/utils/isSigner.ts
+++ b/src/utils/isSigner.ts
@@ -1,9 +1,9 @@
-import { ethers } from "ethers";
+import { Signer } from "ethers";
 
 import { SignerOrProvider } from "../lib/types";
 
 export const isSigner = (
   signerOrProvider: SignerOrProvider
-): signerOrProvider is ethers.Signer => {
+): signerOrProvider is Signer => {
   return "signTransaction" in signerOrProvider;
 };