diff --git a/dvc/command/lock.py b/dvc/command/lock.py
index b231783e7..a36b3cb76 100644
--- a/dvc/command/lock.py
+++ b/dvc/command/lock.py
@@ -46,7 +46,7 @@ def add_parser(subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     lock_parser.add_argument(
-        "targets", nargs="*", help="DVC-files to lock. Optional."
+        "targets", nargs="+", help="DVC-files to lock. Optional."
     )
     lock_parser.set_defaults(func=CmdLock)
 
@@ -59,6 +59,6 @@ def add_parser(subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     unlock_parser.add_argument(
-        "targets", nargs="*", help="DVC-files to unlock. Optional."
+        "targets", nargs="+", help="DVC-files to unlock. Optional."
     )
     unlock_parser.set_defaults(func=CmdUnlock)
diff --git a/dvc/command/remove.py b/dvc/command/remove.py
index 0a308f0c5..130efadbf 100644
--- a/dvc/command/remove.py
+++ b/dvc/command/remove.py
@@ -75,7 +75,7 @@ def add_parser(subparsers, parent_parser):
     )
     remove_parser.add_argument(
         "targets",
-        nargs="*",
+        nargs="+",
         help="DVC-files to remove. Optional."
         "(Finds all DVC-files in the workspace by default.)",
     )