diff --git a/content/articles/markdown/indentation.md b/content/articles/markdown/indentation.md
index 06b2baf..38fada3 100644
--- a/content/articles/markdown/indentation.md
+++ b/content/articles/markdown/indentation.md
@@ -4,6 +4,7 @@ date: 2020-07-16
 oldContentWarning: false
 topics:
 - markdown
+- file-format
 ---
 
 When it comes to indentation in Markdown there are (the usual) two questions:
diff --git a/content/articles/utf8-bom.md b/content/articles/utf8-bom.md
index 2177c19..ccbc9a4 100644
--- a/content/articles/utf8-bom.md
+++ b/content/articles/utf8-bom.md
@@ -4,6 +4,7 @@ date: 2020-03-22
 oldContentWarning: false
 topics:
 - unicode
+- file-format
 ---
 
 When it comes to text file encoding, it usually boils down to two options: