diff --git a/inc/Plugin.php b/inc/Plugin.php
index 7da53c73..f16c989d 100644
--- a/inc/Plugin.php
+++ b/inc/Plugin.php
@@ -22,6 +22,7 @@
 use WP_REST_Request;
 use WP_REST_Response;
 use WP_REST_Server;
+use \Required\Traduttore\Project;
 
 /**
  * Class used to register main actions and filters.
@@ -60,9 +61,18 @@ function ( GP_Translation $translation ) {
 				if ( ! $project || ! $project->is_active() ) {
 					return;
 				}
-				$zip_provider = new ZipProvider( $translation_set );
 
-				$zip_provider->schedule_generation();
+				$last_modified = $translation_set->last_modified();
+				if ( $last_modified ) {
+					$last_modified = new DateTime( $last_modified, new DateTimeZone( 'UTC' ) );
+				} else {
+					$last_modified = new DateTime( 'now', new DateTimeZone( 'UTC' ) );
+				}
+
+				$zip_provider = new ZipProvider( $translation_set );
+				if ( $last_modified > $zip_provider->get_last_build_time() ) {
+					$zip_provider->schedule_generation();
+				}
 			}
 		);
 
@@ -83,9 +93,17 @@ function ( $project_id, $originals_added, $originals_existing, $originals_obsole
 
 				/* @var GP_Translation_Set $translation_set */
 				foreach ( $translation_sets as $translation_set ) {
-					$zip_provider = new ZipProvider( $translation_set );
+					$last_modified = $translation_set->last_modified();
+					if ( $last_modified ) {
+						$last_modified = new DateTime( $last_modified, new DateTimeZone( 'UTC' ) );
+					} else {
+						$last_modified = new DateTime( 'now', new DateTimeZone( 'UTC' ) );
+					}
 
-					$zip_provider->schedule_generation();
+					$zip_provider = new ZipProvider( $translation_set );
+					if ( $last_modified > $zip_provider->get_last_build_time() ) {
+						$zip_provider->schedule_generation();
+					}
 				}
 			},
 			10,
@@ -97,21 +115,45 @@ function ( $project_id, $originals_added, $originals_existing, $originals_obsole
 			function( $translation_set_id ) {
 				/* @var GP_Translation_Set $translation_set */
 				$translation_set = GP::$translation_set->get( $translation_set_id );
-				$last_modified   = $translation_set->last_modified();
 
-				if ( $last_modified ) {
-					$last_modified = new DateTime( $last_modified, new DateTimeZone( 'UTC' ) );
-				} else {
-					$last_modified = new DateTime( 'now', new DateTimeZone( 'UTC' ) );
+				$zip_provider = new ZipProvider( $translation_set );
+				$zip_provider->generate_zip_file();
+			}
+		);
+
+		add_filter(
+			'gp_update_meta',
+			function( $meta_tuple ) {
+				$allowed_keys = [
+					Project::VERSION_KEY, // '_traduttore_version'.
+					Project::TEXT_DOMAIN_KEY, // '_traduttore_text_domain'.
+				];
+				if ( ! in_array( $meta_tuple['meta_key'], $allowed_keys, true ) ) {
+					return $meta_tuple;
 				}
 
-				$zip_provider = new ZipProvider( $translation_set );
+				$project = ( new ProjectLocator( $meta_tuple['object_id'] ) )->get_project();
+				if ( ! $project || ! $project->is_active() ) {
+					return $meta_tuple;
+				}
 
-				if ( $last_modified <= $zip_provider->get_last_build_time() ) {
-					return;
+				$current_value = gp_get_meta( $meta_tuple['object_type'], $meta_tuple['object_id'], $meta_tuple['meta_key'] );
+				if ( $current_value === $meta_tuple['meta_value'] ) {
+					return $meta_tuple;
 				}
 
-				$zip_provider->generate_zip_file();
+				$translation_sets = (array) GP::$translation_set->by_project_id( $project->get_id() );
+				/* @var GP_Translation_Set $translation_set */
+				foreach ( $translation_sets as $translation_set ) {
+					if ( 0 === $translation_set->current_count() ) {
+						continue;
+					}
+
+					$zip_provider = new ZipProvider( $translation_set );
+					$zip_provider->schedule_generation();
+				}
+
+				return $meta_tuple;
 			}
 		);
 
diff --git a/inc/Project.php b/inc/Project.php
index 1ee2528e..eaea85d9 100644
--- a/inc/Project.php
+++ b/inc/Project.php
@@ -98,7 +98,7 @@ class Project {
 	 *
 	 * @var string Text domain meta key.
 	 */
-	protected const TEXT_DOMAIN_KEY = '_traduttore_text_domain';
+	public const TEXT_DOMAIN_KEY = '_traduttore_text_domain';
 
 	/**
 	 * Last update time meta key.
@@ -116,7 +116,7 @@ class Project {
 	 *
 	 * @var string Version number meta key.
 	 */
-	protected const VERSION_KEY = '_traduttore_version';
+	public const VERSION_KEY = '_traduttore_version';
 
 	/**
 	 * GlotPress project.
diff --git a/inc/ZipProvider.php b/inc/ZipProvider.php
index fbfce8ba..318fd907 100644
--- a/inc/ZipProvider.php
+++ b/inc/ZipProvider.php
@@ -43,7 +43,7 @@ class ZipProvider {
 	protected const BUILD_TIME_KEY = '_traduttore_build_time';
 
 	/**
-	 * The GlotPress translation set.
+	 * The current GlotPress translation set.
 	 *
 	 * @since 2.0.0
 	 *
@@ -51,6 +51,24 @@ class ZipProvider {
 	 */
 	protected $translation_set;
 
+	/**
+	 * The current GlotPress locale.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @var GP_Locale The locale.
+	 */
+	protected $locale;
+
+	/**
+	 * The current project.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @var Project The project.
+	 */
+	protected $project;
+
 	/**
 	 * ZipProvider constructor.
 	 *
@@ -60,6 +78,8 @@ class ZipProvider {
 	 */
 	public function __construct( GP_Translation_Set $translation_set ) {
 		$this->translation_set = $translation_set;
+		$this->locale          = GP_Locales::by_slug( $this->translation_set->locale );
+		$this->project         = new Project( GP::$project->get( $this->translation_set->project_id ) );
 	}
 
 	/**
@@ -161,8 +181,9 @@ public function generate_zip_file() : bool {
 		 * @param string             $file            Path to the generated language pack.
 		 * @param string             $url             URL to the generated language pack.
 		 * @param GP_Translation_Set $translation_set Translation set the language pack is for.
+		 * @param Project            $project         The translation set's project.
 		 */
-		do_action( 'traduttore.zip_generated', $this->get_zip_path(), $this->get_zip_url(), $this->translation_set );
+		do_action( 'traduttore.zip_generated', $this->get_zip_path(), $this->get_zip_url(), $this->translation_set, $this->project );
 
 		return true;
 	}
@@ -209,14 +230,22 @@ public function remove_zip_file() : bool {
 	 * @return string ZIP filename.
 	 */
 	protected function get_zip_filename() : string {
-		/* @var GP_Locale $locale */
-		$locale  = GP_Locales::by_slug( $this->translation_set->locale );
-		$project = GP::$project->get( $this->translation_set->project_id );
+		$slug    = str_replace( '/', '-', $this->project->get_slug() );
+		$version = $this->project->get_version();
+
+		if ( $version ) {
+			return sprintf(
+				'%1$s-%2$s-%3$s.zip',
+				$slug,
+				$this->locale->wp_locale,
+				$version
+			);
+		}
 
 		return sprintf(
 			'%1$s-%2$s.zip',
-			str_replace( '/', '-', $project->slug ),
-			$locale->wp_locale
+			$slug,
+			$this->locale->wp_locale
 		);
 	}
 
diff --git a/tests/phpunit/tests/ZipProvider.php b/tests/phpunit/tests/ZipProvider.php
index d5637871..f5d7d4a6 100644
--- a/tests/phpunit/tests/ZipProvider.php
+++ b/tests/phpunit/tests/ZipProvider.php
@@ -100,12 +100,28 @@ public function test_get_zip_path(): void {
 		$this->assertStringEndsWith( 'wp-content/traduttore/foo-project-de_DE.zip', $provider->get_zip_path() );
 	}
 
+	public function test_get_zip_path_with_version(): void {
+		$this->project->set_version( '2.0' );
+
+		$provider = new Provider( $this->translation_set );
+
+		$this->assertStringEndsWith( 'wp-content/traduttore/foo-project-de_DE-2.0.zip', $provider->get_zip_path() );
+	}
+
 	public function test_get_zip_url(): void {
 		$provider = new Provider( $this->translation_set );
 
 		$this->assertSame( home_url( 'wp-content/traduttore/foo-project-de_DE.zip' ), $provider->get_zip_url() );
 	}
 
+	public function test_get_zip_url_with_version(): void {
+		$this->project->set_version( '2.0' );
+
+		$provider = new Provider( $this->translation_set );
+
+		$this->assertSame( home_url( 'wp-content/traduttore/foo-project-de_DE-2.0.zip' ), $provider->get_zip_url() );
+	}
+
 	public function test_get_last_build_time_for_new_set(): void {
 		$provider = new Provider( $this->translation_set );