diff --git a/oauth2.go b/oauth2.go
index da0b5d5..ab1eeb4 100644
--- a/oauth2.go
+++ b/oauth2.go
@@ -80,7 +80,7 @@ func (tr *TokenRetriever) Retrieve(ctx context.Context, data url.Values) (Token,
 	}
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 
-	tr.logger.Infof("retrieve token with request: %+v", req)
+	tr.logger.Infof("retrieve token with request: %+v, body: %+v", req, data.Encode())
 
 	resp, err := tr.httpClient.Do(req)
 	if err != nil {