diff --git a/news/5618.trivial.rst b/news/5618.trivial.rst
new file mode 100644
index 0000000000..718a6602d8
--- /dev/null
+++ b/news/5618.trivial.rst
@@ -0,0 +1 @@
+Add missing spaces to the ``--keep-outdated`` flag's deprecation warning.
diff --git a/pipenv/cli/options.py b/pipenv/cli/options.py
index e3fe51cfb5..9e883b0c9e 100644
--- a/pipenv/cli/options.py
+++ b/pipenv/cli/options.py
@@ -157,7 +157,7 @@ def callback(ctx, param, value):
         state.installstate.keep_outdated = value
         if value:
             click.secho(
-                "The flag --keep-outdated has been deprecated for removal."
+                "The flag --keep-outdated has been deprecated for removal.  "
                 "The flag does not respect package resolver results and leads to inconsistent lock files.  "
                 "Please pin relevant requirements in your Pipfile and discontinue use of this flag.",
                 fg="yellow",