diff --git a/portfolio.go b/portfolio.go
index e9e0e54..88d3f46 100644
--- a/portfolio.go
+++ b/portfolio.go
@@ -6,7 +6,6 @@ import (
 	"net/url"
 
 	"github.com/google/go-querystring/query"
-	"github.com/zerodhatech/go-kite-connect/models"
 )
 
 // Holding is an individual holdings response.
@@ -111,14 +110,13 @@ func (c *Client) ConvertPosition(positionParams ConvertPositionParams) (bool, er
 		b      bool
 		err    error
 		params url.Values
-		out    models.PlainResponse
 	)
 
 	if params, err = query.Values(positionParams); err != nil {
 		return false, NewError(InputError, fmt.Sprintf("Error decoding order params: %v", err), nil)
 	}
 
-	if err = c.doEnvelope(http.MethodPut, URIConvertPosition, params, nil, &out); err == nil {
+	if err = c.doEnvelope(http.MethodPut, URIConvertPosition, params, nil, nil); err == nil {
 		b = true
 	}
 
diff --git a/user.go b/user.go
index d94be8d..4c21cf4 100644
--- a/user.go
+++ b/user.go
@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
-
-	"github.com/zerodhatech/go-kite-connect/models"
 )
 
 // UserSession represents the response after a successful authentication.
@@ -110,18 +108,15 @@ func (c *Client) GenerateSession(requestToken string, apiSecret string) (UserSes
 	return session, err
 }
 
-func (c *Client) invalidateToken(tokenKey string, tokenValue string) (bool, error) {
-	var (
-		b   bool
-		out models.PlainResponse
-	)
+func (c *Client) invalidateToken(tokenType string, token string) (bool, error) {
+	var b bool
 
 	// construct url values
 	params := url.Values{}
 	params.Add("api_key", c.apiKey)
-	params.Add(tokenKey, tokenValue)
+	params.Add(tokenType, token)
 
-	err := c.doEnvelope(http.MethodDelete, URIUserSessionInvalidate, params, nil, &out)
+	err := c.doEnvelope(http.MethodDelete, URIUserSessionInvalidate, params, nil, nil)
 	if err == nil {
 		b = true
 	}