diff --git a/src/main/kotlin/com/restapi/domain/models.kt b/src/main/kotlin/com/restapi/domain/models.kt
index 597ccaa..7df1dc5 100644
--- a/src/main/kotlin/com/restapi/domain/models.kt
+++ b/src/main/kotlin/com/restapi/domain/models.kt
@@ -300,6 +300,8 @@ open class Plant : BaseModel() {
     var print: MutableMap<String, String>? = mutableMapOf()
     @DbJsonB
     var prefixes: MutableMap<String, String>? = mutableMapOf()
+    @DbJsonB
+    var limits: MutableMap<String, String>? = mutableMapOf()
 }
 
 class RefreshHistory {
diff --git a/src/main/resources/dbmigration/1.38.sql b/src/main/resources/dbmigration/1.38.sql
new file mode 100644
index 0000000..3d45f83
--- /dev/null
+++ b/src/main/resources/dbmigration/1.38.sql
@@ -0,0 +1,2 @@
+-- apply alter tables
+alter table plant add column if not exists limits jsonb;
diff --git a/src/main/resources/dbmigration/model/1.38.model.xml b/src/main/resources/dbmigration/model/1.38.model.xml
new file mode 100644
index 0000000..68208dd
--- /dev/null
+++ b/src/main/resources/dbmigration/model/1.38.model.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<migration xmlns="http://ebean-orm.github.io/xml/ns/dbmigration">
+    <changeSet type="apply">
+        <addColumn tableName="plant">
+            <column name="limits" type="jsonb"/>
+        </addColumn>
+    </changeSet>
+</migration>
\ No newline at end of file