diff --git a/textimage.install b/textimage.install
index 1f93efe..136bee6 100755
--- a/textimage.install
+++ b/textimage.install
@@ -11,3 +11,10 @@
 function textimage_uninstall() {
   \Drupal::service('textimage.factory')->flushAll();
 }
+
+/**
+ * Clear caches due to update of the 'textimage.factory' service.
+ */
+function textimage_update_8001() {
+  // Empty update to cause a cache rebuild.
+}