diff --git a/schema/mysql-migrations/upgrade_190.sql b/schema/mysql-migrations/upgrade_190.sql
new file mode 100644
index 000000000..eee825e2e
--- /dev/null
+++ b/schema/mysql-migrations/upgrade_190.sql
@@ -0,0 +1,10 @@
+ALTER TABLE director_activity_log
+  MODIFY COLUMN old_properties MEDIUMTEXT DEFAULT NULL COMMENT 'Property hash, JSON',
+  MODIFY COLUMN new_properties MEDIUMTEXT DEFAULT NULL COMMENT 'Property hash, JSON';
+
+ALTER TABLE icinga_host_var
+  MODIFY COLUMN varvalue MEDIUMTEXT DEFAULT NULL;
+
+INSERT INTO director_schema_migration
+(schema_version, migration_time)
+VALUES (190, NOW());
diff --git a/schema/mysql.sql b/schema/mysql.sql
index 8052ecdea..f33280b95 100644
--- a/schema/mysql.sql
+++ b/schema/mysql.sql
@@ -35,8 +35,8 @@ CREATE TABLE director_activity_log (
   object_type VARCHAR(64) NOT NULL,
   object_name VARCHAR(255) NOT NULL,
   action_name ENUM('create', 'delete', 'modify') NOT NULL,
-  old_properties TEXT DEFAULT NULL COMMENT 'Property hash, JSON',
-  new_properties TEXT DEFAULT NULL COMMENT 'Property hash, JSON',
+  old_properties MEDIUMTEXT DEFAULT NULL COMMENT 'Property hash, JSON',
+  new_properties MEDIUMTEXT DEFAULT NULL COMMENT 'Property hash, JSON',
   author VARCHAR(64) NOT NULL,
   change_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   checksum VARBINARY(20) NOT NULL,
@@ -654,7 +654,7 @@ CREATE TABLE icinga_host_field (
 CREATE TABLE icinga_host_var (
   host_id INT(10) UNSIGNED NOT NULL,
   varname VARCHAR(255) NOT NULL COLLATE utf8_bin,
-  varvalue TEXT DEFAULT NULL,
+  varvalue MEDIUMTEXT DEFAULT NULL,
   format enum ('string', 'json', 'expression'), -- immer string vorerst
   checksum VARBINARY(20) DEFAULT NULL,
   PRIMARY KEY (host_id, varname),