diff --git a/mkdocs_table_reader_plugin/markdown.py b/mkdocs_table_reader_plugin/markdown.py
index 13a2cef..399cca6 100644
--- a/mkdocs_table_reader_plugin/markdown.py
+++ b/mkdocs_table_reader_plugin/markdown.py
@@ -24,7 +24,7 @@ def convert_to_md_table(df: pd.DataFrame, markdown_kwargs: Dict) -> str:
     """
     # Escape any pipe characters, | to \|
     # See https://github.com/astanin/python-tabulate/issues/241
-    df.columns = [replace_unescaped_pipes(c) for c in df.columns]
+    df.columns = [replace_unescaped_pipes(c) if isinstance(c, str) else c for c in df.columns]
 
     # Avoid deprecated applymap warning on pandas>=2.0
     # See https://github.com/timvink/mkdocs-table-reader-plugin/issues/55
diff --git a/mkdocs_table_reader_plugin/plugin.py b/mkdocs_table_reader_plugin/plugin.py
index 9c8692c..c2c6dce 100644
--- a/mkdocs_table_reader_plugin/plugin.py
+++ b/mkdocs_table_reader_plugin/plugin.py
@@ -122,7 +122,6 @@ def on_page_markdown(self, markdown, page, config, files, **kwargs):
                 # note we use the first valid file paths,
                 # where we first search the 'data_path' and then the page's directory.
                 markdown_table = function(valid_file_paths[0], *pd_args, **pd_kwargs)
-
                 markdown_table = fix_indentation(leading_spaces, markdown_table)
 
                 # Insert markdown table
diff --git a/setup.py b/setup.py
index 624a196..432e09d 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name="mkdocs-table-reader-plugin",
-    version="2.2.1",
+    version="2.2.2",
     description="MkDocs plugin to directly insert tables from files into markdown.",
     long_description=long_description,
     long_description_content_type="text/markdown",
diff --git a/tests/fixtures/nonstringheaders/assets/tables/test.csv b/tests/fixtures/nonstringheaders/assets/tables/test.csv
new file mode 100644
index 0000000..99b4b46
--- /dev/null
+++ b/tests/fixtures/nonstringheaders/assets/tables/test.csv
@@ -0,0 +1,3 @@
+A,B,C
+1,2,3
+4242,5,6
\ No newline at end of file
diff --git a/tests/fixtures/nonstringheaders/docs/index.md b/tests/fixtures/nonstringheaders/docs/index.md
new file mode 100644
index 0000000..3463c19
--- /dev/null
+++ b/tests/fixtures/nonstringheaders/docs/index.md
@@ -0,0 +1,3 @@
+# CSV with non string headers
+
+{{ read_csv('assets/tables/test.csv', header=None) }}
diff --git a/tests/fixtures/nonstringheaders/mkdocs.yml b/tests/fixtures/nonstringheaders/mkdocs.yml
new file mode 100644
index 0000000..a8cedf8
--- /dev/null
+++ b/tests/fixtures/nonstringheaders/mkdocs.yml
@@ -0,0 +1,6 @@
+site_name: test git_table_reader site
+use_directory_urls: false
+
+plugins:
+    - search
+    - table-reader
\ No newline at end of file
diff --git a/tests/test_build.py b/tests/test_build.py
index caa0d23..88fcd37 100644
--- a/tests/test_build.py
+++ b/tests/test_build.py
@@ -362,3 +362,15 @@ def test_mixed_quotation_marks(tmp_path):
     page_with_tag = tmp_proj / "site/index.html"
     contents = page_with_tag.read_text()
     assert re.search(r"56", contents)
+
+def test_csv_with_no_string_headers(tmp_path):
+    tmp_proj = setup_clean_mkdocs_folder(
+        "tests/fixtures/nonstringheaders/mkdocs.yml", tmp_path
+    )
+    result = build_docs_setup(tmp_proj)
+    assert result.exit_code == 0, "'mkdocs build' command failed"
+
+    # Make sure the file.csv is inserted
+    page_with_tag = tmp_proj / "site/index.html"
+    contents = page_with_tag.read_text()
+    assert re.search(r"4242", contents)
diff --git a/tests/test_kwargs.py b/tests/test_kwargs.py
index 3cb2961..2521d2f 100644
--- a/tests/test_kwargs.py
+++ b/tests/test_kwargs.py
@@ -21,3 +21,6 @@ def test_parse_argkwarg():
     assert parse_argkwarg('"file.csv", usecols=[\'A\',\'B\']') == (['file.csv'], {'usecols': ['A', 'B']})
     assert parse_argkwarg("'assets/tables/table_with_carriage_return.csv', sep = ','") == (['assets/tables/table_with_carriage_return.csv'], {'sep': ','})
     assert parse_argkwarg("'includes/statistics.csv', keep_default_na=False, colalign=('center','center','center','center','center','center','center')") == (['includes/statistics.csv'], {'keep_default_na': False, 'colalign': ('center','center','center','center','center','center','center')})
+    assert parse_argkwarg('"file.csv", header=None') == (['file.csv'], {'header': None})
+    assert parse_argkwarg("'Example.xlsx', sheet_name = 'test', header = None") == (['Example.xlsx'], {'sheet_name': 'test', 'header': None})
+    assert parse_argkwarg("'test.csv', header = None, names = ['a', 'b', 'c']") == (['test.csv'], {'header': None, 'names': ['a', 'b', 'c']})