diff --git a/ext_tables.sql b/ext_tables.sql
index b7df2dc..0b07cda 100644
--- a/ext_tables.sql
+++ b/ext_tables.sql
@@ -2,7 +2,7 @@ CREATE TABLE tx_mkcontentai_domain_model_alt_text_logs
 (
     uid int(11) NOT NULL auto_increment,
     pid int(11) DEFAULT '0' NOT NULL,
-    alternative varchar(255) NOT NULL DEFAULT '',
+    alternative text,
     table_name varchar(50) NOT NULL DEFAULT '',
     sys_file_metadata int(11) unsigned DEFAULT '0',
     PRIMARY KEY (uid)