diff --git a/cli.py b/cli.py
index 0d0ae47..ede52f8 100644
--- a/cli.py
+++ b/cli.py
@@ -68,8 +68,8 @@ def cli():
     parser.add_argument('-i', '--input-file', help="The blocklist to use")
     parser.add_argument('-r', '--remote-blocklist', help="The remote blocklist as json for debugging reasons")
     parser.add_argument('-o', '--output', help="Filename where to export the blocklist")
-    parser.add_argument('-v', '--verbose',
-                        action='store_true')
+    parser.add_argument('-v', '--verbose', action='store_true')
+    parser.add_argument('-n', '--no-delete', action='store_true', help="Do not delete existing blocks")
     args = parser.parse_args()
     if args.verbose:
         logging.basicConfig(level=logging.DEBUG)
@@ -95,7 +95,7 @@ def cli():
         Instance.show_diffs(local_blocklist, remote_blocklist)
     elif args.action == "deploy":
         diffs = Instance.list_diffs(local_blocklist, remote_blocklist)
-        Instance.apply_blocks_from_diff(diffs, args.server, args.token)
+        Instance.apply_blocks_from_diff(diffs, args.server, args.token, args.no_delete)
     elif args.action == "export":
         export_blocklist_toml(remote_blocklist, args.output)
 
diff --git a/models.py b/models.py
index ee0ef31..c481517 100644
--- a/models.py
+++ b/models.py
@@ -107,9 +107,9 @@ class Instance:
         return diffs
 
     @staticmethod
-    def apply_blocks_from_diff(diffs, server, token):
+    def apply_blocks_from_diff(diffs, server, token, no_delete: bool):
         for diff in diffs:
-            if diff["local"] is None:
+            if diff["local"] is None and not no_delete:
                 """Delete the block on the remote server"""
                 diff['remote'].delete(server, token)
                 logging.info(f"Deleted {diff['remote'].domain} from blocklist")