diff --git a/src/entity/protocol.ts b/src/entity/protocol.ts
index ff25531..c82dd88 100644
--- a/src/entity/protocol.ts
+++ b/src/entity/protocol.ts
@@ -11,12 +11,12 @@ export class protocol {
   @Column({ type: "date" })
   date: Date;
 
-  @Column({ type: "timestamp" })
+  @Column({ type: "timestamp", nullable: true })
   starttime: Date;
 
-  @Column({ type: "timestamp" })
+  @Column({ type: "timestamp", nullable: true })
   endtime: Date;
 
-  @Column({ type: "text" })
+  @Column({ type: "text", nullable: true })
   summary: string;
 }
diff --git a/src/migrations/1728037129072-protocolBase.ts b/src/migrations/1728037129072-protocolBase.ts
index e1f9a71..23f56ea 100644
--- a/src/migrations/1728037129072-protocolBase.ts
+++ b/src/migrations/1728037129072-protocolBase.ts
@@ -9,7 +9,7 @@ export class ProtocolBase1728037129072 implements MigrationInterface {
       new TableColumn({
         name: "starttime",
         type: "timestamp",
-        isNullable: false,
+        isNullable: true,
       })
     );
     await queryRunner.addColumn(
@@ -17,7 +17,7 @@ export class ProtocolBase1728037129072 implements MigrationInterface {
       new TableColumn({
         name: "endtime",
         type: "timestamp",
-        isNullable: false,
+        isNullable: true,
       })
     );
     await queryRunner.addColumn(
@@ -25,7 +25,7 @@ export class ProtocolBase1728037129072 implements MigrationInterface {
       new TableColumn({
         name: "summary",
         type: "text",
-        isNullable: false,
+        isNullable: true,
       })
     );
   }
diff --git a/src/service/protocolService.ts b/src/service/protocolService.ts
index 553b550..53e0baf 100644
--- a/src/service/protocolService.ts
+++ b/src/service/protocolService.ts
@@ -13,7 +13,7 @@ export default abstract class ProtocolService {
       .createQueryBuilder("protocol")
       .offset(offset)
       .limit(count)
-      .orderBy("date")
+      .orderBy("date", "DESC")
       .getManyAndCount()
       .then((res) => {
         return res;