diff --git a/src/main/java/com/loafle/bridge/discoveryhistory/DiscoveryHistory.java b/src/main/java/com/loafle/bridge/discoveryhistory/DiscoveryHistory.java
index fe08b2b..c0255a8 100644
--- a/src/main/java/com/loafle/bridge/discoveryhistory/DiscoveryHistory.java
+++ b/src/main/java/com/loafle/bridge/discoveryhistory/DiscoveryHistory.java
@@ -24,10 +24,32 @@ public class DiscoveryHistory
     @Column(nullable=false)
     private Boolean result;
 
-    @JoinColumn
+    @JoinColumn(nullable=false)
     @OneToOne(mappedBy = "discovery",cascade = CascadeType.ALL)
     private DiscoveryZone zone;
 
+    @Column(columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP", nullable = false, insertable = false, updatable = false)
+    private Date createDate;
+
+    @Column(columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP", nullable = false, insertable = false)
+    private Date updateDate;
+
+    public Date getCreateDate() {
+        return createDate;
+    }
+
+    public void setCreateDate(Date createDate) {
+        this.createDate = createDate;
+    }
+
+    public Date getUpdateDate() {
+        return updateDate;
+    }
+
+    public void setUpdateDate(Date updateDate) {
+        this.updateDate = updateDate;
+    }
+
     public DiscoveryZone getZone() {
         return zone;
     }
diff --git a/src/main/java/com/loafle/bridge/discoveryzone/DiscoveryZone.java b/src/main/java/com/loafle/bridge/discoveryzone/DiscoveryZone.java
index 07f29ea..de8fad9 100644
--- a/src/main/java/com/loafle/bridge/discoveryzone/DiscoveryZone.java
+++ b/src/main/java/com/loafle/bridge/discoveryzone/DiscoveryZone.java
@@ -5,6 +5,7 @@ import com.loafle.bridge.discoveryhistory.DiscoveryHistory;
 import com.loafle.bridge.discoveryhost.DiscoveryHost;
 
 import javax.persistence.*;
+import java.util.Date;
 import java.util.List;
 
 /**
@@ -24,7 +25,7 @@ public class DiscoveryZone {
     @Column(nullable=false)
     private long cidr;
 
-    @JoinColumn
+    @JoinColumn(nullable=false)
     @OneToOne
     @JsonIgnore
     private DiscoveryHistory discovery;
@@ -35,6 +36,28 @@ public class DiscoveryZone {
     @OneToMany(mappedBy = "zone", cascade = CascadeType.ALL)
     private List<DiscoveryHost> discoveryHosts;
 
+    @Column(columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP", nullable = false, insertable = false, updatable = false)
+    private Date createDate;
+
+    @Column(columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP", nullable = false, insertable = false, updatable = false)
+    private Date updateDate;
+
+    public Date getCreateDate() {
+        return createDate;
+    }
+
+    public void setCreateDate(Date createDate) {
+        this.createDate = createDate;
+    }
+
+    public Date getUpdateDate() {
+        return updateDate;
+    }
+
+    public void setUpdateDate(Date updateDate) {
+        this.updateDate = updateDate;
+    }
+
     public List<HostScanHistory> getHistories() {
         return histories;
     }