diff --git a/src/client/RESTClient.ts b/src/client/RESTClient.ts
index 1374f9c5..edf57569 100644
--- a/src/client/RESTClient.ts
+++ b/src/client/RESTClient.ts
@@ -68,7 +68,7 @@ export class RESTClient extends EventEmitter {
     super();
     this.logger = util.debuglog('coinbase-pro-node');
 
-    this.httpClient = axios.default.create({
+    this.httpClient = axios.create({
       baseURL: baseURL,
       timeout: 50_000,
     });
@@ -105,13 +105,10 @@ export class RESTClient extends EventEmitter {
         requestPath,
       });
 
-      config.headers = {
-        ...config.headers,
-        'CB-ACCESS-KEY': signedRequest.key,
-        'CB-ACCESS-PASSPHRASE': signedRequest.passphrase,
-        'CB-ACCESS-SIGN': signedRequest.signature,
-        'CB-ACCESS-TIMESTAMP': `${signedRequest.timestamp}`,
-      };
+      config.headers.set('CB-ACCESS-KEY', signedRequest.key)
+      config.headers.set('CB-ACCESS-PASSPHRASE', signedRequest.passphrase)
+      config.headers.set('CB-ACCESS-SIGN', signedRequest.signature)
+      config.headers.set('CB-ACCESS-TIMESTAMP', `${signedRequest.timestamp}`)
 
       return config;
     });
diff --git a/src/exchange-rate/ExchangeRateAPI.ts b/src/exchange-rate/ExchangeRateAPI.ts
index f7cc0190..45cd2db9 100644
--- a/src/exchange-rate/ExchangeRateAPI.ts
+++ b/src/exchange-rate/ExchangeRateAPI.ts
@@ -22,7 +22,7 @@ export class ExchangeRateAPI {
    * @see https://docs.cloud.coinbase.com/sign-in-with-coinbase/docs/api-exchange-rates#get-exchange-rates
    */
   async getExchangeRates(currency: string = 'USD'): Promise<ExchangeRate> {
-    const response = await axios.default.get<{
+    const response = await axios.get<{
       data: ExchangeRate;
     }>(`${this.baseURL}${ExchangeRateAPI.URL.V2_EXCHANGE_RATES}`, {params: {currency}});
     return response.data.data;
diff --git a/src/order/OrderAPI.ts b/src/order/OrderAPI.ts
index 65a13356..5e2855a0 100644
--- a/src/order/OrderAPI.ts
+++ b/src/order/OrderAPI.ts
@@ -156,7 +156,9 @@ export class OrderAPI {
     const resource = OrderAPI.URL.ORDERS;
     const response = await this.apiClient.get<Order[]>(`${resource}`, {
       params: query,
-      paramsSerializer: querystring.stringify,
+      paramsSerializer: (params) => {
+        return querystring.stringify(params);
+      },
     });
     return {
       data: response.data,
diff --git a/src/time/TimeAPI.ts b/src/time/TimeAPI.ts
index f059dc86..ae38ab15 100644
--- a/src/time/TimeAPI.ts
+++ b/src/time/TimeAPI.ts
@@ -21,7 +21,7 @@ export class TimeAPI {
    * @see https://docs.cloud.coinbase.com/sign-in-with-coinbase/docs/api-time
    */
   async getTime(): Promise<TimeSkew> {
-    const response = await axios.default.get<TimeSkew>(`${this.baseURL}${TimeAPI.URL.TIME}`, {
+    const response = await axios.get<TimeSkew>(`${this.baseURL}${TimeAPI.URL.TIME}`, {
       // This trick forces axios to set JSON headers
       data: {},
     });
diff --git a/src/transfer/TransferAPI.ts b/src/transfer/TransferAPI.ts
index 05e50510..1a29d25e 100644
--- a/src/transfer/TransferAPI.ts
+++ b/src/transfer/TransferAPI.ts
@@ -72,7 +72,9 @@ export class TransferAPI {
     }
     const response = await this.apiClient.get<TransferInformation[]>(resource, {
       params,
-      paramsSerializer: querystring.stringify,
+      paramsSerializer: (params) => {
+        return querystring.stringify(params);
+      },
     });
 
     z.array(TransferInformationSchema).parse(response.data);