diff --git a/src/wp-admin/includes/plugin-install.php b/src/wp-admin/includes/plugin-install.php
index dac564bfa2..018fe64dc1 100644
--- a/src/wp-admin/includes/plugin-install.php
+++ b/src/wp-admin/includes/plugin-install.php
@@ -349,7 +349,7 @@ function install_search_form( $deprecated = true ) {
 function install_plugins_upload() {
 	?>
 <div class="upload-plugin">
-	<p class="install-help"><?php _e( 'If you have a plugin in a .zip format, you may install it by uploading it here.' ); ?></p>
+	<p class="install-help"><?php _e( 'If you have a plugin in a .zip format, you may install or update it by uploading it here.' ); ?></p>
 	<form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo self_admin_url( 'update.php?action=upload-plugin' ); ?>">
 		<?php wp_nonce_field( 'plugin-upload' ); ?>
 		<label class="screen-reader-text" for="pluginzip"><?php _e( 'Plugin zip file' ); ?></label>
diff --git a/src/wp-admin/includes/theme-install.php b/src/wp-admin/includes/theme-install.php
index 94b9f350a8..af3aee0b4c 100644
--- a/src/wp-admin/includes/theme-install.php
+++ b/src/wp-admin/includes/theme-install.php
@@ -179,7 +179,7 @@ function install_themes_dashboard() {
  */
 function install_themes_upload() {
 	?>
-<p class="install-help"><?php _e( 'If you have a theme in a .zip format, you may install it by uploading it here.' ); ?></p>
+<p class="install-help"><?php _e( 'If you have a theme in a .zip format, you may install or update it by uploading it here.' ); ?></p>
 <form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo self_admin_url( 'update.php?action=upload-theme' ); ?>">
 	<?php wp_nonce_field( 'theme-upload' ); ?>
 	<label class="screen-reader-text" for="themezip"><?php _e( 'Theme zip file' ); ?></label>