diff --git a/src/main/java/com/ffii/fpsms/modules/master/entity/BomProcessMaterial.kt b/src/main/java/com/ffii/fpsms/modules/master/entity/BomProcessMaterial.kt
index b6f1d40..88a99ab 100644
--- a/src/main/java/com/ffii/fpsms/modules/master/entity/BomProcessMaterial.kt
+++ b/src/main/java/com/ffii/fpsms/modules/master/entity/BomProcessMaterial.kt
@@ -1,5 +1,6 @@
 package com.ffii.fpsms.modules.master.entity
 
+import com.fasterxml.jackson.annotation.JsonBackReference
 import com.ffii.core.entity.BaseEntity
 import jakarta.persistence.*
 import jakarta.validation.constraints.NotNull
@@ -10,10 +11,12 @@ open class BomProcessMaterial : BaseEntity<Long>() {
     @NotNull
     @ManyToOne(optional = false)
     @JoinColumn(name = "bomProcessId", nullable = false)
+    @JsonBackReference
     open var bomProcess: BomProcess? = null
 
     @NotNull
     @ManyToOne(optional = false)
     @JoinColumn(name = "bomMaterialId", nullable = false)
+    @JsonBackReference
     open var bomMaterial: BomMaterial? = null
 }
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