diff --git a/README.md b/README.md
index b177151..06e1dad 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ This will output the contents of every file, with each file preceded by its rela
   files-to-prompt path/to/directory --cxml
   ```
 
-- `--markdown`: Output as Markdown with fenced code blocks.
+- `-m/--markdown`: Output as Markdown with fenced code blocks.
 
   ```bash
   files-to-prompt path/to/directory --markdown
diff --git a/files_to_prompt/cli.py b/files_to_prompt/cli.py
index 37c408e..7eee04f 100644
--- a/files_to_prompt/cli.py
+++ b/files_to_prompt/cli.py
@@ -225,6 +225,8 @@ def read_paths_from_stdin(use_null_separator):
     help="Output in XML-ish format suitable for Claude's long context window.",
 )
 @click.option(
+    "markdown",
+    "-m",
     "--markdown",
     is_flag=True,
     help="Output Markdown with fenced code blocks",
diff --git a/tests/test_files_to_prompt.py b/tests/test_files_to_prompt.py
index cd0581a..eecfc5d 100644
--- a/tests/test_files_to_prompt.py
+++ b/tests/test_files_to_prompt.py
@@ -377,7 +377,8 @@ def test_paths_from_arguments_and_stdin(tmpdir):
         assert "Contents of file2" in result.output
 
 
-def test_markdown(tmpdir):
+@pytest.mark.parametrize("option", ("-m", "--markdown"))
+def test_markdown(tmpdir, option):
     runner = CliRunner()
     with tmpdir.as_cwd():
         os.makedirs("test_dir")
@@ -389,7 +390,7 @@ def test_markdown(tmpdir):
             f.write("This is javascript")
         with open("test_dir/code.unknown", "w") as f:
             f.write("This is an unknown file type")
-        result = runner.invoke(cli, ["test_dir", "--markdown"])
+        result = runner.invoke(cli, ["test_dir", option])
         assert result.exit_code == 0
         actual = result.output
         expected = (