diff --git a/ynab/accounts.go b/ynab/accounts.go
index 676fe7e..e4a29b9 100644
--- a/ynab/accounts.go
+++ b/ynab/accounts.go
@@ -8,7 +8,7 @@ import (
 
 // Reference: https://api.ynab.com/v1#/Accounts/
 
-type Accounts struct {
+type accounts struct {
 	Data struct {
 		Account struct {
 			ID                  string      `json:"id"`
@@ -29,8 +29,8 @@ type Accounts struct {
 	} `json:"data"`
 }
 
-func (c *Client) GetAccount(accountID string) (*Accounts, error) {
-	response := Accounts{}
+func (c *Client) getAccount(accountID string) (*accounts, error) {
+	response := accounts{}
 
 	err := c.get(fmt.Sprintf("/accounts/%s", accountID), &response, url.Values{})
 	if err != nil {
@@ -49,7 +49,7 @@ func (c *Client) SetAccountBalance(accountID string, balance int) error {
 		return fmt.Errorf("failed to get ynab capital gains transaction ID: %v", err)
 	}
 
-	ynabAccount, err := c.GetAccount(accountID)
+	ynabAccount, err := c.getAccount(accountID)
 	if err != nil {
 		return fmt.Errorf("failed to get ynab account with id '%s': %v", accountID, err)
 	}
diff --git a/ynab/transactions.go b/ynab/transactions.go
index 067f014..dee45b5 100644
--- a/ynab/transactions.go
+++ b/ynab/transactions.go
@@ -7,7 +7,7 @@ import (
 )
 
 // Reference: https://api.ynab.com/v1#/Transactions/
-type Transaction struct {
+type transaction struct {
 	Type                  string      `json:"type,omitempty"`
 	ParentTransactionID   interface{} `json:"parent_transaction_id,omitempty"`
 	ID                    string      `json:"id,omitempty"`
@@ -31,31 +31,31 @@ type Transaction struct {
 }
 
 // Used for single transaction requests
-type TransactionRequest struct {
-	Transaction Transaction `json:"transaction,omitempty"`
+type transactionRequest struct {
+	Transaction transaction `json:"transaction,omitempty"`
 }
 
 // Used for single transaction responses
-type TransactionResponse struct {
+type transactionResponse struct {
 	Data struct {
 		TransactionIDs  []string    `json:"transaction_ids,omitempty"`
-		Transaction     Transaction `json:"transaction"`
+		Transaction     transaction `json:"transaction"`
 		ServerKnowledge int         `json:"server_knowledge,omitempty"`
 	}
 }
 
 // Used for multiple transaction requests / responses
-type TransactionsResponse struct {
+type transactionListResponse struct {
 	Data struct {
-		Transactions    []Transaction `json:"transactions"`
+		Transactions    []transaction `json:"transactions"`
 		ServerKnowledge int           `json:"server_knowledge"`
 	} `json:"data"`
 }
 
 // Accepts a YNAB account ID and timestamp and returns all transactions in that account
 // since the date provided
-func (c *Client) GetAccountTransactions(accountID string, sinceDate time.Time) (*TransactionsResponse, error) {
-	response := TransactionsResponse{}
+func (c *Client) GetAccountTransactions(accountID string, sinceDate time.Time) (*transactionListResponse, error) {
+	response := transactionListResponse{}
 	urlQuery := url.Values{}
 	urlQuery.Add("since_date", sinceDate.Format("2006-01-02"))
 
@@ -86,8 +86,8 @@ func (c *Client) getTodayYnabCapitalGainsTransaction(accountID string) (string,
 // Accepts a YNAB account ID, transaction ID and transaction amount and updates the YNAB transaction with the matching ID
 // If transaction ID is blank, a new transaction is created for the amount specified
 func (c *Client) updateTodayYNABCapitalGainsTransaction(accountID string, transactionID string, amount int) error {
-	request := TransactionRequest{
-		Transaction: Transaction{
+	request := transactionRequest{
+		Transaction: transaction{
 			AccountID: accountID,
 			Amount:    amount,
 			Date:      time.Now().In(c.loc).Format("2006-01-02"),
@@ -97,7 +97,7 @@ func (c *Client) updateTodayYNABCapitalGainsTransaction(accountID string, transa
 			Memo:      fmt.Sprintf("Quoted at: %s", time.Now().In(c.loc).Format("2006-01-02 15:04:05")),
 		},
 	}
-	response := &TransactionResponse{}
+	response := &transactionResponse{}
 	var err error
 	if transactionID == "" { // create transaction
 		err = c.post("/transactions", response, request)