diff --git a/.github/workflows/mikrotik_patch.yml b/.github/workflows/mikrotik_patch.yml
index 4c5e891..2d42435 100644
--- a/.github/workflows/mikrotik_patch.yml
+++ b/.github/workflows/mikrotik_patch.yml
@@ -25,6 +25,7 @@ jobs:
       TZ: 'Asia/Shanghai'
       LATEST_VERSION_URL: 'https://upgrade.mikrotik.com/routeros/NEWESTa7'
       LATEST_VERSION: ""
+      BUILD_TIME: $(date +"%s")
       CUSTOM_LICENSE_PRIVATE_KEY: ${{ secrets.CUSTOM_LICENSE_PRIVATE_KEY }}
       CUSTOM_LICENSE_PUBLIC_KEY: ${{ secrets.CUSTOM_LICENSE_PUBLIC_KEY }}
       CUSTOM_NPK_SIGN_PRIVATE_KEY: ${{ secrets.CUSTOM_NPK_SIGN_PRIVATE_KEY }}
@@ -276,7 +277,7 @@ jobs:
         mkdir -p ./publish/$LATEST_VERSION
         cp CHANGELOG.txt ./publish/$LATEST_VERSION/CHANGELOG
         cp ./new_iso/*.npk ./publish/$LATEST_VERSION/
-        echo $LATEST_VERSION $(date +"%s") > ./publish/NEWESTa7.${{ matrix.channel }}
+        echo $LATEST_VERSION $BUILD_TIME > ./publish/NEWESTa7.${{ matrix.channel }}
         sudo apt-get install -y lftp > /dev/null 2>&1
         sudo -E lftp -u ${{ secrets.SSH_USERNAME }},'${{ secrets.SSH_PASSWORD }}' sftp://${{ secrets.SSH_SERVER }}:${{ secrets.SSH_PORT }} <<EOF
         set sftp:auto-confirm yes
diff --git a/npk.py b/npk.py
index dfe0318..ce31b89 100644
--- a/npk.py
+++ b/npk.py
@@ -261,9 +261,12 @@ if __name__=='__main__':
     eddsa_private_key = bytes.fromhex(os.environ['CUSTOM_NPK_SIGN_PRIVATE_KEY'])
     kcdsa_public_key = bytes.fromhex(os.environ['CUSTOM_LICENSE_PUBLIC_KEY'])
     eddsa_public_key = bytes.fromhex(os.environ['CUSTOM_NPK_SIGN_PUBLIC_KEY'])
+    build_time = os.environ['BUILD_TIME']
     if args.command =='sign':
         print(f'Signing {args.input}')
         npk = NovaPackage.load(args.input)
+        if build_time:
+            npk[NpkPartID.NAME_INFO].data._build_time = int(build_time)
         npk.sign(kcdsa_private_key,eddsa_private_key)
         npk.save(args.output)
     elif args.command == 'verify':
@@ -279,6 +282,8 @@ if __name__=='__main__':
         print(f'Creating {args.output} from {args.input}')
         option_npk = NovaPackage.load(args.input)
         option_npk[NpkPartID.NAME_INFO].data.name = args.name
+        if build_time:
+            option_npk[NpkPartID.NAME_INFO].data._build_time = int(build_time)
         option_npk[NpkPartID.DESCRIPTION].data = args.description.encode() if args.description else args.name.encode()
         option_npk[NpkPartID.NULL_BLOCK].data = b''
         option_npk[NpkPartID.SQUASHFS].data = open(args.squashfs,'rb').read() 
diff --git a/patch.py b/patch.py
index 4e585f8..91febc2 100644
--- a/patch.py
+++ b/patch.py
@@ -109,6 +109,10 @@ def patch_npk_file(key_dict,kcdsa_private_key,eddsa_private_key,input_file,outpu
         run_shell_command(f"rm -rf {extract_dir}")
         npk[NpkPartID.SQUASHFS].data = open(squashfs_file,'rb').read()
         run_shell_command(f"rm -f {squashfs_file}")
+
+    build_time = os.environ['BUILD_TIME']
+    if build_time:
+        npk[NpkPartID.NAME_INFO].data._build_time = int(build_time)
     npk.sign(kcdsa_private_key,eddsa_private_key)
     npk.save(output_file or input_file)