diff --git a/broker/migrate/h2/V30__add_group_member_create_dt.sql b/broker/migrate/h2/V30__add_group_member_create_dt.sql
new file mode 100755
index 00000000..30bff398
--- /dev/null
+++ b/broker/migrate/h2/V30__add_group_member_create_dt.sql
@@ -0,0 +1 @@
+alter table t_group_member add column `_create_dt`  bigint(20) DEFAULT 0;
diff --git a/broker/migrate/mysql/V35__add_group_member_create_dt.sql b/broker/migrate/mysql/V35__add_group_member_create_dt.sql
new file mode 100755
index 00000000..cd18871f
--- /dev/null
+++ b/broker/migrate/mysql/V35__add_group_member_create_dt.sql
@@ -0,0 +1 @@
+alter table t_group_member add column `_create_dt`  bigint(20) DEFAULT 0, COMMENT "group member create time";
diff --git a/broker/src/main/java/io/moquette/persistence/DatabaseStore.java b/broker/src/main/java/io/moquette/persistence/DatabaseStore.java
index e64294f7..7d80d3cf 100644
--- a/broker/src/main/java/io/moquette/persistence/DatabaseStore.java
+++ b/broker/src/main/java/io/moquette/persistence/DatabaseStore.java
@@ -331,7 +331,7 @@ public class DatabaseStore {
             String sql = "select `_mid`" +
                 ", `_alias`" +
                 ", `_type`" +
-                ", `_dt` from t_group_member where _gid = ?";
+                ", `_dt`, `_create_dt` from t_group_member where _gid = ?";
             statement = connection.prepareStatement(sql);
 
             statement.setString(1, groupId);
@@ -358,6 +358,9 @@ public class DatabaseStore {
                 long longValue = rs.getLong(index++);
                 builder.setUpdateDt(longValue);
 
+                longValue = rs.getLong(index++);
+                builder.setCreateDt(longValue);
+
                 WFCMessage.GroupMember member = builder.build();
                 groupMembers.put(groupId, member);
             }
@@ -1652,7 +1655,7 @@ public class DatabaseStore {
                     ", `_mid`" +
                     ", `_alias`" +
                     ", `_type`" +
-                    ", `_dt`) values(?, ?, ?, ?, ?)" +
+                    ", `_dt`, `_create_dt`) values(?, ?, ?, ?, ?, ?)" +
                     " ON DUPLICATE KEY UPDATE " +
                     "`_alias` = ?," +
                     "`_type` = ?," +
@@ -1673,6 +1676,7 @@ public class DatabaseStore {
                     statement.setString(index++, member.getAlias());
                     statement.setInt(index++, member.getType());
                     statement.setLong(index++, dt);
+                    statement.setLong(index++, member.getCreateDt());
                     statement.setString(index++, member.getAlias());
                     statement.setInt(index++, member.getType());
                     statement.setLong(index++, dt);
diff --git a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
index 7d4f9ccf..5ad41eeb 100755
--- a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
+++ b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
@@ -781,9 +781,9 @@ public class MemoryMessagesStore implements IMessagesStore {
         List<WFCMessage.GroupMember> updatedMemberList = new ArrayList<>();
         for (WFCMessage.GroupMember member : memberList) {
             if (member.getMemberId().equals(groupInfo.getOwner())) {
-                member = member.toBuilder().setUpdateDt(dt).setType(ProtoConstants.GroupMemberType.GroupMemberType_Owner).build();
+                member = member.toBuilder().setUpdateDt(dt).setCreateDt(dt).setType(ProtoConstants.GroupMemberType.GroupMemberType_Owner).build();
             } else {
-                member = member.toBuilder().setUpdateDt(dt).build();
+                member = member.toBuilder().setUpdateDt(dt).setCreateDt(dt).build();
             }
             groupMembers.put(groupId, member);
             updatedMemberList.add(member);
@@ -843,9 +843,9 @@ public class MemoryMessagesStore implements IMessagesStore {
         ArrayList<String> newInviteUsers = new ArrayList<>();
         for (WFCMessage.GroupMember member : memberList) {
             if (member.getMemberId().equals(groupInfo.getOwner())) {
-                member = member.toBuilder().setType(GroupMemberType_Owner).setUpdateDt(updateDt).setAlias("").build();
+                member = member.toBuilder().setType(GroupMemberType_Owner).setUpdateDt(updateDt).setCreateDt(updateDt).setAlias("").build();
             } else {
-                member = member.toBuilder().setType(GroupMemberType_Normal).setUpdateDt(updateDt).setAlias("").build();
+                member = member.toBuilder().setType(GroupMemberType_Normal).setUpdateDt(updateDt).setCreateDt(updateDt).setAlias("").build();
             }
             tmp.add(member);
             newInviteUsers.add(member.getMemberId());