diff --git a/api/client.go b/api/client.go
index 8490267..4ca41f5 100644
--- a/api/client.go
+++ b/api/client.go
@@ -3,23 +3,10 @@ package deepl
 import (
 	"fmt"
 	"net/http"
-	"net/url"
-	"strings"
-	"time"
 )
 
-type Client struct {
-	httpClient *http.Client
-}
-
-func NewClient(timeout time.Duration) *Client {
-	client := &http.Client{
-		Timeout: timeout,
-	}
-
-	return &Client{
-		httpClient: client,
-	}
+type HTTPClient interface {
+	Do(*http.Request) (*http.Response, error)
 }
 
 type HTTPError struct {
@@ -34,20 +21,3 @@ func (err HTTPError) Error() string {
 		return fmt.Sprintf("%d - %s", err.StatusCode, http.StatusText(err.StatusCode))
 	}
 }
-
-func (c *Client) do(method string, url string, data url.Values, headers http.Header) (*http.Response, error) {
-	req, err := http.NewRequest(method, url, strings.NewReader(data.Encode()))
-	if err != nil {
-		return nil, err
-	}
-
-	for k, vs := range headers {
-		for _, v := range vs {
-			req.Header.Add(k, v)
-		}
-	}
-
-	res, err := c.httpClient.Do(req)
-
-	return res, err
-}
diff --git a/api/document.go b/api/document.go
index 6bb7239..13d5db8 100644
--- a/api/document.go
+++ b/api/document.go
@@ -81,7 +81,7 @@ func (t *Translator) TranslateDocumentUpload(filePath string, targetLang string,
 	req.Header.Set("Authorization", fmt.Sprintf("DeepL-Auth-Key %s", t.authKey))
 	req.Header.Add("Content-Type", mpw.FormDataContentType())
 
-	res, err := t.httpClient.httpClient.Do(req)
+	res, err := t.client.Do(req)
 	if err != nil {
 		return nil, err
 	} else if res.StatusCode != http.StatusOK {
diff --git a/api/translator.go b/api/translator.go
index 156512f..876c899 100644
--- a/api/translator.go
+++ b/api/translator.go
@@ -14,9 +14,9 @@ const (
 )
 
 type Translator struct {
-	httpClient *Client
-	serverURL  string
-	authKey    string
+	client    HTTPClient
+	serverURL string
+	authKey   string
 }
 
 // TranslatorOption is a functional option for configuring the Translator
@@ -54,12 +54,13 @@ func NewTranslator(authKey string, opts ...TranslatorOption) (*Translator, error
 
 	// Set up default http client
 	timeout := time.Second * 30
-	httpClient := NewClient(timeout)
 
 	t := &Translator{
-		httpClient: httpClient,
-		serverURL:  serverURL,
-		authKey:    authKey,
+		client: &http.Client{
+			Timeout: timeout,
+		},
+		serverURL: serverURL,
+		authKey:   authKey,
 	}
 
 	// Parse and apply options
@@ -82,9 +83,18 @@ func (t *Translator) callAPI(method string, endpoint string, data url.Values, he
 		headers.Set("Content-Type", "application/x-www-form-urlencoded")
 	}
 
-	res, err := t.httpClient.do(method, url, data, headers)
+	req, err := http.NewRequest(method, url, strings.NewReader(data.Encode()))
+	if err != nil {
+		return nil, err
+	}
+
+	for k, vs := range headers {
+		for _, v := range vs {
+			req.Header.Add(k, v)
+		}
+	}
 
-	return res, err
+	return t.client.Do(req)
 }
 
 // authKeyIsFreeAccount determines whether the supplied auth key belongs to a Free account
diff --git a/internal/cmd/document.go b/internal/cmd/document.go
index f3ea905..13bc954 100644
--- a/internal/cmd/document.go
+++ b/internal/cmd/document.go
@@ -11,8 +11,8 @@ import (
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 
-	table "github.com/cluttrdev/deepl-go/internal"
 	deepl "github.com/cluttrdev/deepl-go/api"
+	table "github.com/cluttrdev/deepl-go/internal"
 )
 
 var documentCmd = &cobra.Command{
diff --git a/internal/cmd/glossaries.go b/internal/cmd/glossaries.go
index e08a19a..de4d36a 100644
--- a/internal/cmd/glossaries.go
+++ b/internal/cmd/glossaries.go
@@ -8,8 +8,8 @@ import (
 
 	"github.com/spf13/cobra"
 
-	table "github.com/cluttrdev/deepl-go/internal"
 	deepl "github.com/cluttrdev/deepl-go/api"
+	table "github.com/cluttrdev/deepl-go/internal"
 )
 
 var glossaryCmd = &cobra.Command{