diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt
index 6ce5570d5..726a5eab2 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt
@@ -761,6 +761,11 @@ abstract class MatteryScreen<T : MatteryMenu>(menu: T, inventory: Inventory, tit
 		const val MAX_ROWS = 6
 
 		var lastScroll = 0
-		var lastRows by ClientConfig.GUI::EXOPACK_INVENTORY_ROWS
+		var lastRows: Int
+			get() = ClientConfig.GUI::EXOPACK_INVENTORY_ROWS.get()
+			set(value) {
+				ClientConfig.GUI::EXOPACK_INVENTORY_ROWS.set(value)
+				ClientConfig.spec.save()
+			}
 	}
 }
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/config/AbstractConfig.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/config/AbstractConfig.kt
index 98e7277eb..b76938fb9 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/config/AbstractConfig.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/config/AbstractConfig.kt
@@ -11,7 +11,8 @@ import ru.dbotthepony.mc.otm.core.math.defineDecimal
 import ru.dbotthepony.mc.otm.core.util.WriteOnce
 
 abstract class AbstractConfig(private val configName: String, private val type: ModConfig.Type = ModConfig.Type.SERVER) {
-	private var spec: ModConfigSpec by WriteOnce()
+	var spec: ModConfigSpec by WriteOnce()
+		private set
 	protected val builder = ModConfigSpec.Builder()
 	private var registered = false